The DOI matches its Crossref record; 223 of the 223 references it cites were found in a registry or an index; 145 of the 248 sources its claims cite were checked for support.
International Society of Sports Nutrition position stand: diets for body weight reduction
Open accessAbstract
The International Society of Sports Nutrition (ISSN) has developed an official position on diets for body weight reduction. This critical analysis of the literature is intended to provide a scientific foundation for practitioners, coaches, and trainees regarding the effects of the major diet types in adults who are generally healthy, physically active, and/or athletic, while drawing from clinical research in those with overweight/obesity, when relevant. This position stand does not address acute dehydration-based weight cutting, pharmacotherapy (i.e. GLP-1RAs), or bariatric surgery. The following 15 points constitute the Position Statement of the Society; the Research Committee has approved them. 1) Diets for body weight reduction can be broadly categorized by the magnitude of the energy deficit, linearity of the deficit, and macronutrient composition. These factors need to be tailored to individual preferences, tolerances, and goals.2) Very-low-energy diets (<800 kcal/day) and low-energy diets (800-1200 kcal/day) produce greater short-term weight loss but lack long-term advantages over less aggressive energy restrictions, such as calorie-controlled diets. These aggressive diets may increase lean mass loss, although adequate protein intake and resistance training may mitigate this risk. Caution is warranted about insufficiencies in vitamins, minerals, fiber, and other nutrients.3) The evidence at-large shows a lack of differential effects between intermittent fasting variants (alternate-day fasting, time-restricted eating, and twice-weekly fasting) and continuous energy restriction on anthropometric outcomes, although macronutrient quality plays an independent role in optimizing body composition and metabolic health.4) Intra-day meal frequency (as opposed to total daily nutrition) does not tend to crucially influence body weight and body fat reduction. Meal frequency may be individualized flexibly; no lower or upper limits can universally be prescribed to optimize outcomes. However, in physically active and athletic populations, distributing protein across at least three protein-rich meals (or eating occasions) per day may optimize lean mass retention and performance during sustained energy deficits.5) Resistance training and sufficient protein intake are indispensable mitigators of lean mass loss in a sustained caloric deficit, regardless of the diet type or variant. Total daily protein is of primary importance; specific distribution of the constituent doses is a secondary concern.6) For the general population, a daily protein intake of 1.2-1.6 g/kg BW is appropriate for supporting total body weight and fat loss, physical activity, and imparting benefits to musculoskeletal and cardiometabolic health.7) Daily protein intakes ranging 1.6-2.2 g/kg BW combined with resistance training may optimize muscle anabolism, while higher intakes of 1.9-3.2 g/kg BW can maximize lean mass retention in lean, resistance-trained individuals sustaining hypocaloric conditions.8) The dietary carbohydrate‒fat proportion can be individualized to personal preference for the goal of weight loss, since the range of ketogenic to low-fat diets performs similarly.9) Ketogenic diets are effective at bodyweight and body fat reduction, but they also tend to decrease fat-free mass to a greater degree than higher-carbohydrate comparators, particularly in shorter trials where glycogen and total body water shifts can influence estimates.10) Adaptations to weight loss can be physical, physiological, and/or behavioral, and converge toward reducing energy expenditure to fulfill the body's drive toward neutralizing disruptions to homeostasis imposed by the caloric deficit.11) Adaptive thermogenesis is a reduction in resting energy expenditure beyond that predicted by changes in body composition. It can occur in response to hypocaloric conditions and weight loss, but it is not an inevitable response, and it may attenuate substantially upon attainment of weight stability.12) Metabolic adaptations that reduce energy expenditure, including adaptive thermogenesis, and impair gut microbial diversity, can often be attenuated by strategic dietary and exercise programming that foster nutrient-absorption and partitioning, and metabolic flexibility.13) A multitude of tactics can be implemented to manage and overcome plateaus. However, plateaus are also opportunities/cues to practice maintaining progress made thus far (the ultimate goal is the maintenance of a plateau).14) Guidance from an interdisciplinary team of health professionals while maintaining social support is recommended for successful weight management.15) Learning how to prepare home-cooked meals (and plan meals ahead of time through the day) puts dieters in control of their nutritional fate - and in a better position to succeed in managing their body weight and body composition.
Overview
AI snapshot
Written from the paper’s full text.
TL;DR
This ISSN position stand concludes that body weight reduction is driven primarily by sustained energy deficit and adherence, while diet type and macronutrient distribution can be individualized. High-quality weight loss emphasizes lean mass preservation through resistance training and adequate protein, with intermittent fasting, meal frequency, and carbohydrate–fat ratio showing little consistent long-term advantage over continuous energy restriction.
Key findings
- Very-low-energy diets (VLEDs; <800 kcal/day) and low-energy diets (LEDs; 800–1200 kcal/day) produce greater short-term weight loss but lack consistent long-term advantages. VLED total diet replacement phases yielded 12.4–27.2 kg loss and LED phases 6.9–7.9 kg; VLEDs plus behavioral programs produced 3.9 kg greater loss at 1 year, 1.4 kg at 2 years, and 1.3 kg at 38–60 months (no longer statistically significant). Aggressive restriction may increase lean mass loss, though adequate protein and resistance training can mitigate this.
- Intermittent fasting variants (alternate-day fasting, time-restricted eating, twice-weekly fasting) generally produce anthropometric and cardiometabolic outcomes comparable to continuous energy restriction. A meta-analysis found fasting-based strategies had only 0.94 kg greater body weight and 1.08 kg greater fat mass reduction at 6 months, deemed not clinically significant; beyond 6 months there were no statistically significant differences. Meal frequency itself had little effect: a 15-study meta-analysis found no effect on total body weight, and removing one 2-week boxer study eliminated the apparent body-composition effect.
- Protein is central to lean mass retention. The paper recommends 1.2–1.6 g/kg/day for the general population, 1.6–2.2 g/kg/day with resistance training to optimize muscle anabolism, and 1.9–3.2 g/kg/day to maximize lean mass retention in lean, resistance-trained individuals in hypocaloric conditions. A 54-RCT meta-analysis found higher-protein diets (20%–45% energy) produced greater weight loss, fat loss, and cardiometabolic improvements than lower-protein comparators (20%–23% energy).
- Ketogenic diets are effective for weight and fat loss but tend to reduce fat-free mass more than higher-carbohydrate comparators. A 13-study review in physically active subjects reported body weight reduction of 2.7 vs. 0.3 kg and fat mass reduction of 2.3 vs. 0.3 kg, but fat-free mass decreased by 0.3 kg with ketogenic diets and increased by 0.7 kg in controls. A 13-RCT meta-analysis in resistance trainees found ketogenic diets reduced body weight by 3.67 kg and fat mass by 2.21 kg, but also reduced fat-free mass by 1.26 kg versus controls. Adaptive thermogenesis is measurable but often modest and substantially attenuated or absent in weight-stable conditions; a 33-study review of 2528 participants found adaptive thermogenesis in 27 studies, but it was generally smaller or non-significant in higher-quality studies.
Methods
- ISSN position stands are invited papers: senior editors and/or the Research Committee identify a lead author or team to perform a comprehensive literature review; the draft is sent to leading scholars, revised as a consensus statement, and approved by the Research Committee and Editors as the official ISSN position.
- A literature search was conducted in PubMed/MEDLINE and Google Scholar (last search: August 7, 2026) using terms related to energy restriction, intermittent fasting (ADF, TRE, 5:2), protein intake, meal frequency/protein distribution, low-carbohydrate diets, ketogenic diets, low-fat diets, adaptive thermogenesis, and weight loss plateaus. Systematic reviews/meta-analyses and randomized controlled trials were prioritized, supplemented by controlled feeding studies and mechanistic work; reference lists were hand-searched.
- Evidence was appraised qualitatively; no formal GRADE process was applied. Graphic summaries (Figures 1–6) accompany Sections 3–8.
Limitations
- The paper states that no formal GRADE process was applied, and that much of the long-term weight loss literature derives from overweight/obese clinical populations; extrapolation to lean, athletic, or resistance-trained individuals should be interpreted within that specific context.
- The paper states it does not address acute dehydration-based weight cutting, pharmacotherapy (e.g., GLP-1 receptor agonists), or bariatric surgery. It also notes that many meal-frequency trials combine higher protein intakes, structured exercise, and other co-interventions, limiting causal attribution to meal frequency per se.
- Evident from the text: this is a narrative position-stand synthesis rather than a systematic review, and several cited trials have acknowledged methodological constraints, including small samples, lack of experimental control, short durations, low protein intake, or no formal exercise training (e.g., Fothergill et al., Seimon et al.).
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Claims the paper makes
97 Own interpretation · 50 Supported · 36 Partly supported · 35 No full text of the sources · 31 Not checked yet · 6 Supported so far · 6 No basis given · 4 Own method · 3 Mixed support · 3 Sources not found · 2 Not supported · 1 Couldn’t confirm · accuracy not yet measured
Some cited sources support this claim and some don’t — read each source’s verdict below.
In the paper
“The critical issue with BMI is that it correlates poorly with body fat percentage (BF%) [13–15].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Background
What the sources say
- Supportedcites [13] Nuttall FQ. Body mass index: obesity, BMI, and health: a critical review. Nutr Today. 2015; 50(3): 117– 128. doi: 10.1097/NT.0000000000000092 PMC4890841 27340299 source
In “BMI as a Determinant of Body Fat Mass,” the review explicitly describes a relatively poor correlation between BMI and percent body fat, citing evidence from men and the NHANES III database. It notes that the limitation is particularly pronounced in men. (LLM, conf=0.94)
- Disputedcites [14] Flegal KM, Shepherd JA, Looker AC, et al. Comparisons of percentage body fat, body mass index, waist circumference, and waist-stature ratio in adults. AJCN. 2009; 89(2): 500– 508. doi: 10.3945/ajcn.2008.26847 PMC2647766 19116329 sourceExperimental — accuracy not yet measured
The Discussion says BMI and percentage body fat were highly correlated within sex-age groups, contrary to the claim that they correlate poorly. The Results report BMI–body-fat correlations of 0.716–0.789 in men and 0.724–0.839 in women for the age groups specified. (LLM, conf=0.90)
Checked by a reasoning model — may be wrong.
- Not checked — no full text of the sourcecites [15] Okorodudu DO, Jumean MF, Montori VM, et al. Diagnostic performance of body mass index to identify obesity as defined by body adiposity: a systematic review and meta-analysis. Int J Obes (Lond). 2010; 34(5): 791– 799. doi: 10.1038/ijo.2010.5 20125098 source
plaincorrelational- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Supported
At least one cited source doesn’t support this claim or points to a different paper, and none confirmed it — see the verdicts below.
In the paper
“Gout was the only one of the fifteen adverse effects for which men exhibited a higher prevalence.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Very low-energy diets (VLEDs) and low-energy diets (LEDs)
What the sources say
- Disputedcites [49] Christensen P, Meinert Larsen T, Westerterp-Plantenga M, et al. Men and women respond differently to rapid weight loss: metabolic outcomes of a multi-centre intervention study after a low-energy diet in 2500 overweight, individuals with pre-diabetes (PREVIEW). Diabetes Obes Metab. 2018; 20(12): 2840– 2851. doi: 10.1111/dom.13466 PMC6282840 30088336 sourceExperimental — accuracy not yet measured
In Results, Table 3, gout was more prevalent in men (0.8%) than women (0.0%), but it was not the only adverse effect with a higher reported prevalence in men. Sore throat (0.6% vs 0.4%) and dizziness (2.4% vs 1.8%) were also higher in men, although those differences were not marked statistically significant. (LLM, conf=0.93)
Checked by a reasoning model — may be wrong.
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Disputed
Some cited sources support this claim and some don’t — read each source’s verdict below.
In the paper
“It is worth noting that traditional concerns with high protein intakes (i.e. adverse effects on kidney, liver, and bone health) lack evidentiary support in healthy populations [123–128].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Partly supportedcites [123] Antonio J, Ellerbroek A, Silver T, et al. A high protein diet has no harmful effects: a one-year crossover study in resistance-trained males. J Nutr Metab. 2016; 2016: 9104792. doi: 10.1155/2016/9104792 PMC5078648 27807480 sourceExperimental — accuracy not yet measured
The Discussion reports no harmful effects on renal or hepatic function in resistance-trained young men consuming a high-protein diet, supporting the kidney and liver portions of the claim. The Methods describe blood tests but no assessment of bone health, and the Limitations caution that the small study may not apply to other populations. This paper therefore does not establish the broader claim for healthy populations or its bone-health component. (LLM, conf=0.88)
- Partly supportedcites [124] Antonio J, Ellerbroek A, Evans C, et al. High protein consumption in trained women: bad to the bone?. J Int Soc Sports Nutr. 2018; 15: 6. doi: 10.1186/s12970-018-0210-6 PMC5793405 29434529 sourceExperimental — accuracy not yet measured
The Background reports evidence that a high-protein diet for one year had no negative effect on kidney or liver function. The Conclusion reports no harm to bone density or content in exercise-trained women and states that there is no evidence of harm to bone health. These passages support the general concern being questioned, but the kidney and liver evidence is limited to a one-year study and this paper’s bone findings are limited to exercise-trained women, rather than healthy populations generally. (LLM, conf=0.85)
- Not checked — no full text of the sourcecites [125] French SJ, Kanter M, Maki KC, et al. The harms of high protein intake: conjectured, postulated, claimed, and presumed, but shown? AJCN. 2025; 122(1): 9– 16. doi: 10.1016/j.ajcnut.2025.05.002 40339907 source
- Partly supportedcites [126] Devries MC, Sithamparapillai A, Brimble KS, et al. Changes in kidney function do not differ between healthy adults consuming Higher- compared with Lower- or normal-protein diets: a systematic review and meta-analysis. J Nutr. 2018; 148(11): 1760– 1775. doi: 10.1093/jn/nxy197 PMC6236074 30383278 sourceExperimental — accuracy not yet measured
The Introduction says no causal link between increased protein intake and kidney damage has been established in healthy people, and the Discussion says there is no evidence linking high-protein intake to kidney disease in healthy individuals. The paper does not establish the same point for liver or bone health; references to studies of calcium and bone outcomes do not substantiate that broader claim. (LLM, conf=0.88)
- Disputedcites [127] Kim H, Lee S, Choue R. Metabolic responses to high protein diet in Korean elite bodybuilders with high-intensity resistance exercise. J Int Soc Sports Nutr. 2011; 8: 10. doi: 10.1186/1550-2783-8-10 PMC3142197 21722409 sourceExperimental — accuracy not yet measured
The Discussion (Diet characteristics; page unavailable) says high-protein diets can induce metabolic acidosis and increase urinary calcium, which may adversely affect bone metabolism. The Conclusions (page unavailable) also caution that excessive protein intake could lead to negative health outcomes. Although the study did not establish kidney, liver, or bone damage in healthy populations, it does not support the blanket assertion that these concerns lack evidentiary support. (LLM, conf=0.82)
Checked by a reasoning model — may be wrong.
- Not checked — no full text of the sourcecites [128] Antonio J. High-protein diets in trained individuals. Res Sports Med. 2019; 27(2): 195– 203. doi: 10.1080/15438627.2018.1523167 30244609 source
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Partly supported
Some cited sources support this claim and some don’t — read each source’s verdict below.
In the paper
“However, this idea lacks support from controlled, isocaloric, protein-equated diet comparisons of disparate carbohydrate‒fat proportions, which consistently show no statistically significant fat loss differences between the KD and LFD groups [104,135,148,160,161].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Partly supportedcites [104] Aragon AA, Schoenfeld BJ, Wildman R, et al. International society of sports nutrition position stand: diets and body composition. J Int Soc Sports Nutr. 2017; 14: 16. doi: 10.1186/s12970-017-0174-y PMC5470183 28630601 sourceExperimental — accuracy not yet measured
The Ketogenic diets section (page unavailable) says that, with scant exception, controlled protein- and energy-matched comparisons found no fat-loss advantage for ketogenic diets. It does not establish the more specific claim that every KD-versus-low-fat comparison showed no statistically significant difference; its summary includes non-KD comparators and notes a slight fat-loss advantage for higher-carbohydrate, lower-fat diets. (LLM, conf=0.86)
- Partly supportedcites [135] Gardner CD, Trepanowski JF, Del Gobbo LC, et al. Effect of low-fat vs low-carbohydrate diet on 12-Month weight loss in overweight adults and the association with genotype pattern or insulin secretion: the DIETFITS randomized clinical trial. J Am Med Assoc. 2018; 319(7): 667– 679. doi: 10.1001/jama.2018.0245 PMC5839290 29466592 sourceExperimental — accuracy not yet measured
The Conclusions report no significant difference in 12-month weight change, and Table 3 shows no significant between-group difference in body-fat percentage. But this trial compared healthy low-carbohydrate and low-fat diets, not a ketogenic diet and a low-fat diet under controlled, isocaloric, protein-equated conditions. The Results report different protein intakes, and the Weight Loss Intervention section says no calorie target was prescribed. (LLM, conf=0.90)
- Not checked yetcites [148] Leaf A, Rothschild JA, Sharpe TM, et al. International society of sports nutrition position stand: ketogenic diets. J Int Soc Sports Nutr. 2024; 21(1): 2368167. doi: 10.1080/15502783.2024.2368167 PMC11212571 38934469 source
A check is scheduled.
- Disputedcites [160] Hall KD, Guo J. Obesity energetics: body weight regulation and the effects of diet composition. Gastroenterology. 2017; 152(7): 1718– 1727 e3. doi: 10.1053/j.gastro.2017.01.052 PMC5568065 28193517 sourceExperimental — accuracy not yet measured
In “Influence of Dietary Macronutrients on Energy Balance and Body Composition,” the paper reports a statistically significant pooled difference in body-fat loss favoring lower-fat diets (16 g/day; P < .0001), contrary to the claim that the comparisons consistently found no statistically significant difference. The authors consider the effect physiologically meaningless, but that does not make it statistically nonsignificant. (LLM, conf=0.90)
Checked by a reasoning model — may be wrong.
- Check pendingcites [161] Buga A, Kackley ML, Crabtree CD, et al. The effects of a 6-Week controlled, hypocaloric ketogenic diet, with and without exogenous ketone salts, on body composition responses. Front Nutr. 2021; 8: 618520. doi: 10.3389/fnut.2021.618520 PMC8044842 33869263 source
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Partly supported
At least one cited source doesn’t support this claim or points to a different paper, and none confirmed it — see the verdicts below.
In the paper
“Hall and Guo [160] conducted a meta-analysis of 32 controlled feeding studies, strictly limited to comparisons where protein and energy intake were equated between conditions. No statistically significant differences in weight loss or fat loss were detected, despite carbohydrate proportions ranging 1%–83% and dietary fat ranging 4%–84%.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Disputedcites [160] Hall KD, Guo J. Obesity energetics: body weight regulation and the effects of diet composition. Gastroenterology. 2017; 152(7): 1718– 1727 e3. doi: 10.1053/j.gastro.2017.01.052 PMC5568065 28193517 sourceExperimental — accuracy not yet measured
The ‘Influence of Dietary Macronutrients’ section confirms the 32 controlled feeding studies, equal protein and calories, and the stated carbohydrate and fat ranges. But it reports a statistically significant difference in body fat loss favoring lower-fat diets (16 g/day; P < .0001), contrary to the claim that no significant fat-loss difference was detected. The reported effect was described as physiologically small; the passage does not report a pooled weight-loss result. (LLM, conf=0.90)
Checked by a reasoning model — may be wrong.
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Disputed
Every source the paper cites for this claim was checked and supports it.
In the paper
“However, ADF tended to promote greater weight loss than CER and TRE.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Supportedcites [67] Elortegui Pascual P, Rolands MR, Eldridge AL, et al. A meta-analysis comparing the effectiveness of alternate day fasting, the 5:2 diet, and time-restricted eating for weight loss. Obesity (Silver Spring). 2023; 31 (Suppl 1): 9– 21. doi: 10.1002/oby.23568 PMC10098946 36349432 source
The Abstract’s Study Importance section says the pooled network analysis ranked alternate-day fasting highest for weight-loss efficacy, followed by caloric energy restriction and time-restricted eating. The claim’s “tended to” wording is consistent with that ranking. (LLM, conf=0.93)
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“However, these benefits are likely the result of weight loss via hypoenergetic conditions, rather than inherent or independent effects of intermittent energy restriction [61].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Supportedcites [61] Rynders CA, Thomas EA, Zaman A, et al. Effectiveness of intermittent fasting and time-restricted feeding compared to continuous energy restriction for weight loss. Nutrients. 2019; 11(10): 2442. doi: 10.3390/nu11102442 PMC6836017 31614992 source
Section 7 (page unavailable) says the available human evidence suggests intermittent fasting offers little to no cardiometabolic advantage over continuous energy restriction. It concludes that the magnitude of weight loss, rather than the dietary treatment, appears to be the main driver of the observed changes, supporting the claim’s qualified wording. (LLM, conf=0.90)
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“High-quality weight loss has distinct advantages for athletic performance.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Background
What the sources say
- Partly supportedcites [10] Esco MR, Fedewa MV, Cicone ZS, et al. Field-based performance tests are related to body fat percentage and fat-free mass, but not body mass index, in youth soccer players. Sports (Basel). 2018; 6(4): 105. doi: 10.3390/sports6040105 PMC6316319 30261675 sourceExperimental — accuracy not yet measured
The Discussion and Conclusions (pages not provided) link lower body-fat percentage and higher fat-free mass with better field-test performance in youth soccer players and recommend aiming for optimal body composition. They do not test weight loss or establish that “high-quality weight loss” improves athletic performance; the study reports associations, not benefits caused by losing weight. (LLM, conf=0.86)
- Not checked — no full text of the sourcecites [11] Jalilvand F, Banoocy NK, Rumpf MC, et al. Relationship between body mass, peak power, and power-to-body mass ratio on sprint velocity and momentum in high-school football players. J Strength Cond Res. 2019; 33(7): 1871– 1877. doi: 10.1519/JSC.0000000000002808 30124563 source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Partly supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“A 25% lean mass loss as a result of VLEDs and LEDs is commonly reported [32–34].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Very low-energy diets (VLEDs) and low-energy diets (LEDs)
What the sources say
- Supportedcites [32] Saris WH. Very-low-calorie diets and sustained weight loss. Obes Res. 2001; 9(Suppl 4): 295S– 301S. doi: 10.1038/oby.2001.134 11707557 source
In “Composition, Safety, and Beneficial Effects” (page not supplied), the paper says lean body mass accounts for approximately 25% of total weight lost with very-low-calorie diets and describes its preservation as comparable to that with low-calorie diets. The 25% refers to a share of total weight loss, not a 25% reduction in a person’s starting lean mass; the paper also excludes the first two weeks of dieting from that approximate ratio. (LLM, conf=0.87)
- Partly supportedcites [33] Ardavani A, Aziz H, Smith K, et al. The effects of very low energy diets and low energy diets with exercise training on skeletal muscle mass: a narrative review. Adv Ther. 2021; 38(1): 149– 163. doi: 10.1007/s12325-020-01562-0 PMC7854408 33211298 sourceExperimental — accuracy not yet measured
In ‘An Introduction to Very-Low-Energy Diets,’ the review says that approximately 25% of total weight loss with LEDs is lean body mass; Table 1 also lists 25% lean body mass loss for VLEDs as a share of weight lost. The citing sentence omits that denominator and could be read as a 25% reduction in lean mass itself, which the source does not establish. (LLM, conf=0.86)
- Not checked — no full text of the sourcecites [34] Hoie LH, Bruusgaard D, Thom E. Reduction of body mass and change in body composition on a very low calorie diet. Int J Obes Relat Metab Disord. 1993; 17(1): 17– 20. 8383636
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Finally, of relevance to the present subtopic of non-VLED/LED research are the findings of Unick et al. [43,57], showing that faster initial weight loss is a predictor of long-term weight loss maintenance.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Non-VLED/LED research related to the magnitude of the deficit
What the sources say
- Supportedcites [43] Unick JL, Neiberg RH, Hogan PE, et al. Weight change in the first 2 months of a lifestyle intervention predicts weight changes 8 years later. Obesity (Silver Spring). 2015; 23(7): 1353– 1356. doi: 10.1002/oby.21112 PMC4481874 26110890 source
The Discussion states that weight loss in the first two months predicted weight loss eight years later. The Results further show that participants with greater early weight loss had higher odds of achieving at least 5% weight loss at Year 8. This supports the citing sentence’s paraphrase of faster initial loss predicting long-term maintenance. (LLM, conf=0.92)
- Supportedcites [57] Unick JL, Pellegrini CA, Demos KE, et al. Initial weight loss response as an indicator for providing early rescue efforts to improve long-term treatment outcomes. Curr Diab Rep. 2017; 17(9): 69. doi: 10.1007/s11892-017-0904-1 PMC5789799 28726155 source
The section “Early weight loss or program adherence as a marker of success” (page not provided) reports that greater weight loss in the first few months is associated with better long-term outcomes. It also states that weight loss in the first month predicted weight loss at 1, 4, and 8 years, supporting the claim about long-term maintenance. (LLM, conf=0.90)
plaincorrelational- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Supported
- It may state two separate claims as one. 104
- Probably not a substantial claim. 30
- The quote only partly states this claim. 4
Every source the paper cites for this claim was checked and supports it.
In the paper
“However, a recent network meta-analysis by Pascual et al. [67] reported a wider range of weight loss. In studies ranging 2–26 weeks, the body weight reduction in ADF was 0.77%–12.97%. The weight losses in the TRE and TWF were 0.95%–8.60% and 1.70%–7.97%, respectively.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Supportedcites [67] Elortegui Pascual P, Rolands MR, Eldridge AL, et al. A meta-analysis comparing the effectiveness of alternate day fasting, the 5:2 diet, and time-restricted eating for weight loss. Obesity (Silver Spring). 2023; 31 (Suppl 1): 9– 21. doi: 10.1002/oby.23568 PMC10098946 36349432 source
The Results (Study characteristics) state that intervention periods ranged from 2 to 26 weeks. The Results (Meta-analysis of IF regimens for weight loss) give the quoted weight-loss ranges for ADF/MADF, TRE, and the 5:2 diet, which the claim calls TWF. (LLM, conf=0.92)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Zero-calorie ADF research is scarce, but thus far has shown good long-term tolerability [64] and similar effectiveness as daily caloric restriction [65].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Supportedcites [64] Stekovic S, Hofer SJ, Tripolt N, et al. Alternate day fasting improves physiological and molecular markers of aging in healthy, non-obese humans. Cell Metab 2019; 30(3): 462– 76 e6. doi: 10.1016/j.cmet.2019.07.016 31471173 source
Citation [64] is attached to the claim of good long-term tolerability, not the comparison with daily caloric restriction, which is attributed to [65]. The cited paper’s Results and Discussion includes a section titled “Long-Term Effects of ADF Include Lower Levels of Cholesterol and Triiodothyronine without Adverse Side Effects,” supporting that claim; no page number is available in our copy. (LLM, conf=0.82)
- Supportedcites [65] Catenacci VA, Pan Z, Ostendorf D, et al. A randomized pilot study comparing zero-calorie alternate-day fasting to daily caloric restriction in adults with obesity. Obesity (Silver Spring). 2016; 24(9): 1874– 1883. doi: 10.1002/oby.21581 PMC5042570 27569118 source
Citation [65] is attached to the comparison with daily caloric restriction, not the separate long-term tolerability claim cited to [64]. The Conclusion reports similar weight loss and changes in lipids and insulin sensitivity after the 8-week intervention, with no greater weight regain after 24 weeks of follow-up. (LLM, conf=0.92)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“A sustained state of low energy availability can increase injury risk, exacerbate or foster psychological disorders, and eventually lead to a condition called relative energy deficiency in sport (RED-S)”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Background
What the sources say
- Supportedcites [21] Gallant TL, Ong LF, Wong L, et al. Low energy availability and relative energy deficiency in sport: a systematic review and meta-analysis. Sports Med. 2025; 55(2): 325– 339. doi: 10.1007/s40279-024-02130-0 39485653 source
The Introduction says LEA sets the stage for REDs and that athletes with REDs can be predisposed to anxiety, depression, or other mental illnesses. The Discussion links LEA to higher injury incidence, while the Introduction describes long-term harms of LEA and REDs. The copy supplies section labels but no page numbers. (LLM, conf=0.87)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“Research demonstrates that, with such caloric restriction, nutrient intake is affected, adding to nutritional insufficiencies in the diet [51], which over time, impacts overall health and well-being for the individual.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Very low-energy diets (VLEDs) and low-energy diets (LEDs)
What the sources say
- Partly supportedcites [51] Damms-Machado A, Weser G, Bischoff SC. Micronutrient deficiency in obese subjects undergoing low calorie diet. Nutr J. 2012; 11: 34. doi: 10.1186/1475-2891-11-34 PMC3404899 22657586 sourceExperimental — accuracy not yet measured
The Discussion (page unavailable) reports that some micronutrient deficiencies increased or persisted after three months on a low-calorie formula diet in obese subjects. It does not show that caloric restriction reduced nutrient intake: the formula supplied vitamins and minerals at or above general recommendations, and the authors offer several possible explanations for the deficiencies. The later claim about health and well-being is not directly supported by the intervention findings. (LLM, conf=0.85)
boosteddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Rests on an assumption: For individuals on prescription medications for weight loss such as GLP-1 receptor agonists, the effect is an induction of low to very low energy intake, analogous to purposeful dieting.
- Partly supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“A large, multi-center trial by Christensen et al. [49] (the PREVIEW study) examined the 8-week effects of an 810-kcal LED in 2224 overweight, prediabetic subjects with prediabetes, and found that compared to men, women lost less fat mass (7.09 vs. 9.33 kg) and more FFM (3.17 vs. 1.90 kg).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Very low-energy diets (VLEDs) and low-energy diets (LEDs)
What the sources say
- Supportedcites [49] Christensen P, Meinert Larsen T, Westerterp-Plantenga M, et al. Men and women respond differently to rapid weight loss: metabolic outcomes of a multi-centre intervention study after a low-energy diet in 2500 overweight, individuals with pre-diabetes (PREVIEW). Diabetes Obes Metab. 2018; 20(12): 2840– 2851. doi: 10.1111/dom.13466 PMC6282840 30088336 source
The Abstract’s Materials and methods section describes an 8-week, 810-kcal/day diet in overweight participants with pre-diabetes, and its Results section reports 2,224 baseline participants. The Results section reports greater fat-mass loss in men and greater fat-free-mass loss in women; its rounded values match the figures in the claim. Page numbers are not provided in our copy. (LLM, conf=0.94)
plaincorrelational- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“Lean mass loss was slightly greater in the 4:3 model (between-group difference: 1.2 kg), but there was no specific resistance training assignment in this trial, and protein intake in both groups was low (15% of total kcal; ~0.6 g/kg).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Partly supportedcites [74] Catenacci VA, Ostendorf DM, Pan Z, et al. The effect of 4:3 intermittent fasting on weight loss at 12 months: a randomized clinical trial. Ann Intern Med. 2025; 178(5): 634– 644. doi: 10.7326/ANNALS-24-01631 PMC12863240 40163873 sourceExperimental — accuracy not yet measured
Methods > Randomization and Interventions (page unavailable) specifies a 15%-protein dietary target for both groups and a moderate-intensity aerobic activity recommendation, but no specific resistance-training assignment. Results > Body Weight and Composition (page unavailable) describes body-composition estimates as imprecise; the text does not give the claimed 1.2 kg lean-mass difference. Nor does it establish that actual protein intake in both groups was 15% of calories or approximately 0.6 g/kg. (LLM, conf=0.86)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
The cited sources that could be checked couldn’t confirm or dispute this claim.
In the paper
“VLEDs combined with a behavioral program produced 3.9 kg greater weight loss at 1 year than a behavioral program alone. This advantage decreased to 1.4 kg at 2 years and 1.3 kg at 38–60 months, with the difference no longer statistically significant at the latter time point.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Very low-energy diets (VLEDs) and low-energy diets (LEDs)
What the sources say
- Could not verifycites [45] Parretti HM, Jebb SA, Johns DJ, et al. Clinical effectiveness of very-low-energy diets in the management of weight loss: a systematic review and meta-analysis of randomized controlled trials. Obes Rev. 2016; 17(3): 225– 234. doi: 10.1111/obr.12366 26775902 sourceExperimental — accuracy not yet measured
Split into 2 atoms — 0 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 2 unverifiable. Expand the claim to see per-atom verdicts.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Could not verify
Every source the paper cites for this claim was checked and supports it.
In the paper
“Of particular relevance to body weight regulation, fasting has the potential to liberate large amounts of fatty acids from adipose tissue and increase the expression of peroxisome proliferator-activated receptor alpha [60], thereby enhancing hepatic beta-oxidation.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Supportedcites [60] Kersten S, Seydoux J, Peters JM, et al. Peroxisome proliferator-activated receptor alpha mediates the adaptive response to fasting. J Clin Invest. 1999; 103(11): 1489– 1498. doi: 10.1172/JCI6223 PMC408372 10359558 source
The Introduction states that fasting delivers large amounts of fatty acids to the liver, induces PPARα expression in wild-type mice, and stimulates hepatic fatty acid oxidation. The Discussion also links increased PPARα expression during fasting to the liver’s increased need for fatty acid oxidation. (LLM, conf=0.92)
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Recently, a 12-month trial by Catenacci et al. [74] reported greater weight loss with a 4:3 model (3 weekly modified fasting days; ~20% of maintenance needs) versus daily caloric restriction in adults with overweight or obesity. The between-group weight loss difference was 2.89 kg in favor of the 4:3 model.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Supportedcites [74] Catenacci VA, Ostendorf DM, Pan Z, et al. The effect of 4:3 intermittent fasting on weight loss at 12 months: a randomized clinical trial. Ann Intern Med. 2025; 178(5): 634– 644. doi: 10.7326/ANNALS-24-01631 PMC12863240 40163873 source
Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“In athletic populations sustaining hypocaloric conditions, limiting weekly rates of weight loss to 0.5%–1.0% of total body weight may optimize the retention of lean mass [55,56], thus potentially minimizing the likelihood of the collateral fattening phenomenon [8].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Non-VLED/LED research related to the magnitude of the deficit
What the sources say
- Partly supportedcites [55] Ruiz-Castellano C, Espinar S, Contreras C, et al. Achieving an optimal fat loss phase in resistance-trained athletes: a narrative review. Nutrients. 2021; 13(9): 3255. doi: 10.3390/nu13093255 PMC8471721 34579132 sourceExperimental — accuracy not yet measured
Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
- Partly supportedcites [56] Helms ER, Aragon AA, Fitschen PJ. Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation. J Int Soc Sports Nutr. 2014; 11: 20. doi: 10.1186/1550-2783-11-20 PMC4033492 24864135 sourceExperimental — accuracy not yet measured
In “Caloric intake for competition,” the paper recommends losing approximately 0.5–1% of body weight weekly to improve lean-body-mass retention, but frames that recommendation for bodybuilding contest preparation rather than athletic populations generally. The separate claim about collateral fattening is attached to citation [8], not this source. (LLM, conf=0.84)
- Supportedcites [8] Dulloo AG, Miles-Chan JL, Schutz Y. Collateral fattening in body composition autoregulation: its determinants and significance for obesity predisposition. Eur J Clin Nutr. 2018; 72(5): 657– 664. doi: 10.1038/s41430-018-0138-6 PMC5945583 29559726 source
Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“A recent 10-week trial by Vargas-Molina et al. [120] compared high-protein diets (2.5 g/kg) at either maintenance/eucaloric balance or a slight (10%) caloric deficit in resistance-trained subjects. In the hypocaloric group, fat mass decreased (2.94 kg) to a greater degree than that in the eucaloric group (1.41 kg), while both groups gained similar amounts of lean mass (1.04 kg and 0.97 kg, respect”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Supportedcites [120] Vargas-Molina S, Garcia-Palumbo A, Garcia-Sillero M, et al. Comparison of two nutritional protocols in body re-composition of resistance-trained participants. Eur J Appl Physiol. 2026; 126(7): 4019– 4030. doi: 10.1007/s00421-026-06209-6 PMC13380550 41940947 source
Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Strength and exercise performance improved in both groups, with no statistically significant differences between the groups.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Supportedcites [118] Antonio J, Ellerbroek A, Silver T, et al. A high protein diet (3.4 g/kg/d) combined with a heavy resistance training program improves body composition in healthy trained men and women--a follow-up investigation. J Int Soc Sports Nutr. 2015; 12: 39. doi: 10.1186/s12970-015-0100-0 PMC4617900 26500462 source
The Abstract’s Results report significant improvements over time in maximal strength, vertical jump, and pull-ups in both groups, with no significant time-by-group effects for any exercise performance measure. The Discussion likewise states that both groups significantly increased muscular strength, power, and endurance. (LLM, conf=0.94)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“The most recent position stand of the International Society of Sports Nutrition recommends 1.4–2.0 g/kg, with intakes beyond this range potentially benefiting resistance trainees in hypocaloric conditions [98].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Supportedcites [98] Jager R, Kerksick CM, Campbell BI, et al. International Society of Sports Nutrition position stand: protein and exercise. J Int Soc Sports Nutr. 2017; 14: 20. doi: 10.1186/s12970-017-0177-8 PMC5477153 28642676 source
The Recommended intake > Key points section identifies 1.4–2.0 g/kg/day as a minimum recommended intake and says greater amounts may be needed when restricting energy intake while maintaining fat-free mass. The position stand also states that higher intakes may help resistance-trained people during hypocaloric periods. (LLM, conf=0.94)
plainconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. It may state two separate claims as one.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“Despite their capability to facilitate statistically significant weight loss [132], VLFDs lack significant fat loss advantages compared to higher-fat diets, particularly in the long-term [133–135].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Low-fat and low-carbohydrate diets
What the sources say
- Supportedcites [132] Huang RY, Huang CC, Hu FB, et al. Vegetarian diets and weight reduction: a meta-analysis of randomized controlled trials. J Gen Intern Med. 2016; 31(1): 109– 116. doi: 10.1007/s11606-015-3390-7 PMC4699995 26138004 source
Citation [132] supports only the first clause, about statistically significant weight loss; the fat-loss comparison is attributed to [133–135]. The Study Characteristics section says six of eight vegan-diet trials used recipes with ≤10% fat, and the Weight Change section reports significant weight loss for the vegan-diet subgroup relative to controls. The paper does not separately estimate an effect for very-low-fat diets. (LLM, conf=0.85)
- Not checked — no full text of the sourcecites [133] Gardner CD, Kiazand A, Alhassan S, et al. Comparison of the atkins, zone, ornish, and LEARN diets for change in weight and related risk factors among overweight premenopausal women: the A TO Z weight loss study: a randomized trial. J Am Med Assoc. 2007; 297(9): 969– 977. doi: 10.1001/jama.297.9.969 17341711 source
- Not checked — no full text of the sourcecites [134] de Souza RJ, Bray GA, Carey VJ, et al. Effects of 4 weight-loss diets differing in fat, protein, and carbohydrate on fat mass, lean mass, visceral adipose tissue, and hepatic fat: results from the POUNDS LOST trial. AJCN. 2012; 95(3): 614– 625. doi: 10.3945/ajcn.111.026328 PMC3278241 22258266 source
- Partly supportedcites [135] Gardner CD, Trepanowski JF, Del Gobbo LC, et al. Effect of low-fat vs low-carbohydrate diet on 12-Month weight loss in overweight adults and the association with genotype pattern or insulin secretion: the DIETFITS randomized clinical trial. J Am Med Assoc. 2018; 319(7): 667– 679. doi: 10.1001/jama.2018.0245 PMC5839290 29466592 sourceExperimental — accuracy not yet measured
The Secondary Outcomes section reports no significant difference in body-fat percentage between the diets at 12 months, supporting the comparison cited in [133–135]. But participants in the healthy low-fat group obtained a mean 29% of energy from fat at 12 months; the paper does not establish the same finding for very-low-fat diets. The separate claim about statistically significant weight loss is attached to [132], not this source. (LLM, conf=0.86)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“Although IF variants largely lack anthropometric or clinical advantages over CER, each of the IF variants has consistently shown effectiveness as an ad libitum approach [58].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Partly supportedcites [58] Aragon AA, Schoenfeld BJ. Does timing matter? A narrative review of intermittent fasting variants and their effects on bodyweight and body composition. Nutrients. 2022; 14(23): 5022. doi: 10.3390/nu14235022 PMC9736182 36501050 sourceExperimental — accuracy not yet measured
The Executive Summary (section 4; page not provided) says IF variants generally perform similarly to daily caloric restriction for weight and fat loss and cardiometabolic health. It describes ADF, TWF, and TRE as allowing ad libitum eating, but the TRE discussion (section 3.1; page not provided) reports an ad libitum trial with no significant fat loss. Thus, the claim that every variant has consistently been effective as an ad libitum approach overstates the review. (LLM, conf=0.87)
boosted- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“Illustrating this, a large systematic review and meta-analysis by Vogtschmidt et al. [97], which included 54 RCTs found that higher-protein diets (20%–45% of total energy) resulted in greater weight loss, fat loss, and improvements in cardiometabolic risk factors (systolic blood pressure, total cholesterol, triglycerides, and insulin) than lower-protein comparator diets (20%–23% of total energy).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Partly supportedcites [97] Vogtschmidt YD, Raben A, Faber I, et al. Is protein the forgotten ingredient: effects of higher compared to lower protein diets on cardiometabolic risk factors. A systematic review and meta-analysis of randomised controlled trials. Atherosclerosis. 2021; 328: 124– 135. doi: 10.1016/j.atherosclerosis.2021.05.011 34120735 sourceExperimental — accuracy not yet measured
The Study selection process reports 54 RCTs, and the Abstract reports small favourable effects on weight loss, fat mass loss, systolic blood pressure, some lipid outcomes and insulin. Study characteristics gives the higher-protein range as 20–45% of energy, but the lower-protein range as 10–23%, not the claimed 20–23%. (LLM, conf=0.92)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“Potential mechanisms of these results are not fully understood, but may include increased satiety, which drives lower intakes of non-protein macronutrients, increased energy expenditure through exercise- and non-exercise-mediated pathways, decreased de novo lipogenesis, and under-reporting of actual protein intakes, or other factors [104].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Partly supportedcites [104] Aragon AA, Schoenfeld BJ, Wildman R, et al. International society of sports nutrition position stand: diets and body composition. J Int Soc Sports Nutr. 2017; 14: 16. doi: 10.1186/s12970-017-0174-y PMC5470183 28630601 sourceExperimental — accuracy not yet measured
The High-protein diets section (page unavailable) proposes increased satiety, exercise and non-exercise energy expenditure, and suppressed hepatic lipogenesis as possible explanations for the results. It also mentions possible misreporting of energy intake, but does not specify under-reporting of protein intake. (LLM, conf=0.88)
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
- Partly supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Subsequently, a 4-week trial by Longland et al. [119] compared a protein intake of 1.2 vs 2.4 g/kg in overweight and obese subjects in hypocaloric conditions (40% below maintenance caloric needs). The lower-protein group’s lean mass was unchanged, and the fat mass was reduced (3.5 kg). In the higher protein group, fat mass reduced to an even greater degree (4.8 kg), while gaining lean mass”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Supportedcites [119] Longland TM, Oikawa SY, Mitchell CJ, et al. Higher compared with lower dietary protein during an energy deficit combined with intense exercise promotes greater lean mass gain and fat mass loss: a randomized trial. AJCN. 2016; 103(3): 738– 746. doi: 10.3945/ajcn.115.119339 26817506 source
Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Both groups gained 1.5 kg of lean mass, but the high-protein group lost more fat mass (1.6 vs 0.3 kg in the control group).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Supportedcites [118] Antonio J, Ellerbroek A, Silver T, et al. A high protein diet (3.4 g/kg/d) combined with a heavy resistance training program improves body composition in healthy trained men and women--a follow-up investigation. J Int Soc Sports Nutr. 2015; 12: 39. doi: 10.1186/s12970-015-0100-0 PMC4617900 26500462 source
The Discussion reports that both groups gained 1.5 kg of fat-free mass and that fat-mass loss averaged 1.6 kg in the high-protein group versus 0.3 kg in the normal-protein group. It also states that the high-protein group lost significantly more fat mass. (LLM, conf=0.95)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“The data on VLFDs are limited, largely consisting of vegan and vegetarian diets that aggressively restrict fat intake [104].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Low-fat and low-carbohydrate diets
What the sources say
- Supportedcites [104] Aragon AA, Schoenfeld BJ, Wildman R, et al. International society of sports nutrition position stand: diets and body composition. J Int Soc Sports Nutr. 2017; 14: 16. doi: 10.1186/s12970-017-0174-y PMC5470183 28630601 source
The Low-Fat diets section says research on very-low-fat diets is limited and that controlled intervention data mainly come from trials of vegetarian and vegan diets that aggressively minimize fat intake. This directly supports the citing sentence. (LLM, conf=0.95)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“The current RDA for protein (0.8 g/kg/day), while generally sufficient to meet the basic protein requirements of healthy, sedentary adults, is unlikely to be optimal – and may be insufficient for preserving or maximizing lean mass and optimizing body composition – in many populations and physiological states, particularly during exercise training, aging, and energy restriction [98–104].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Partly supportedcites [98] Jager R, Kerksick CM, Campbell BI, et al. International Society of Sports Nutrition position stand: protein and exercise. J Int Soc Sports Nutr. 2017; 14: 20. doi: 10.1186/s12970-017-0177-8 PMC5477153 28642676 sourceExperimental — accuracy not yet measured
Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
- Supportedcites [99] Phillips SM, Chevalier S, Leidy HJ. Protein “requirements” beyond the RDA: implications for optimizing health. Appl Physiol Nutr Metab. 2016; 41(5): 565– 572. doi: 10.1139/apnm-2015-0550 26960445 source
Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
- Not checked yetcites [100] Aragon AA, Tipton KD, Schoenfeld BJ. Age-related muscle anabolic resistance: inevitable or preventable? Nutr Rev. 2023; 81(4): 441– 454. doi: 10.1093/nutrit/nuac062 36018750
- Partly supportedcites [101] Nunes EA, Colenso-Semple L, McKellar SR, et al. Systematic review and meta-analysis of protein intake to support muscle mass and function in healthy adults. J Cachexia Sarcopenia Muscle. 2022; 13(2): 795– 810. doi: 10.1002/jcsm.12922 PMC8978023 35187864 sourceExperimental — accuracy not yet measured
Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
- Partly supportedcites [102] Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med. 2018; 52(6): 376– 384. doi: 10.1136/bjsports-2017-097608 PMC5867436 28698222 sourceExperimental — accuracy not yet measured
Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
- Not checked yetcites [103] Thomas DT, Erdman KA, Burke LM. American college of sports Medicine joint position statement. Nutrition and athletic performance. Med Sci Sports Exerc. 2016; 48(3): 543– 568. doi: 10.1249/MSS.0000000000000852 26891166
- Partly supportedcites [104] Aragon AA, Schoenfeld BJ, Wildman R, et al. International society of sports nutrition position stand: diets and body composition. J Int Soc Sports Nutr. 2017; 14: 16. doi: 10.1186/s12970-017-0174-y PMC5470183 28630601 sourceExperimental — accuracy not yet measured
Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“More recent trials by Arciero et al. [71,91] found that the latter approach (high-protein/high-frequency) combined with 1–2 weekly modified fasting days (~500 kcal/day) was superior to the conventional control diets for improving body composition in a caloric deficit, most likely driven by enhanced gut microbiome diversity and metabolomic signatures [4].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Influence of within-day meal frequency
What the sources say
- Not checked yetcites [71] Arciero PJ, Poe M, Mohr AE, et al. Intermittent fasting and protein pacing are superior to caloric restriction for weight and visceral fat loss. Obesity (Silver Spring). 2023; 31 (Suppl 1): 139– 149. doi: 10.1002/oby.23660 PMC10107279 36575144
- Not checked yetcites [91] Arciero PJ, Arciero KM, Poe M, et al. Intermittent fasting two days versus one day per week, matched for total energy intake and expenditure, increases weight loss in overweight/obese men and women. Nutr J. 2022; 21(1): 36. doi: 10.1186/s12937-022-00790-0 PMC9166203 35658959
- Partly supportedcites [4] Mohr AE, Sweazea KL, Bowes DA, et al. Gut microbiome remodeling and metabolomic profile improves in response to protein pacing with intermittent fasting versus continuous caloric restriction. Nat Commun. 2024; 15(1): 4155. doi: 10.1038/s41467-024-48355-5 PMC11133430 38806467 sourceExperimental — accuracy not yet measured
Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
Every source the paper cites for this claim was checked and supports it.
In the paper
“A salient example of apparently protein-driven recomposition was by Antonio et al. [118], who compared the effects of normal/habitual protein intake (2.3 g/kg) versus high protein intake (3.4 g/kg) on body composition and performance in resistance-trained subjects. The 8-week trial involved a periodized, progressive resistance training program with sessions occurring 5 days/week. Despite the”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Supportedcites [118] Antonio J, Ellerbroek A, Silver T, et al. A high protein diet (3.4 g/kg/d) combined with a heavy resistance training program improves body composition in healthy trained men and women--a follow-up investigation. J Int Soc Sports Nutr. 2015; 12: 39. doi: 10.1186/s12970-015-0100-0 PMC4617900 26500462 source
The Results > Diet table reports that the high-protein group’s intake rose from 2,240 to 2,614 kcal/day, an increase of 374 kcal/day. Abstract > Results reports that this group consumed 3.4 g/kg/day of protein, lost an average of 1.7 kg of fat mass, and gained 1.5 kg of fat-free mass. The Methods > Training program table spans eight weeks. (LLM, conf=0.93)
hedgeddirect- Asserted: passes — The authors put it forward as true.
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- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one. The quote only partly states this claim.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“A 13-RCT meta-analysis by Bueno et al. [167] compared KDs with LFDs in trials lasting a minimum of 12 months. Although KD resulted in statistically greater weight loss than LFD, the absolute difference was relatively minor (0.91 kg) and was no longer apparent at 24 months.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Supportedcites [167] Bueno NB, de Melo IS, de Oliveira SL, et al. Very-low-carbohydrate ketogenic diet v. Low-fat diet for long-term weight loss: a meta-analysis of randomised controlled trials. Br J Nutr. 2013; 110(7): 1178– 1187. doi: 10.1017/S0007114513000548 23651522 source
Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“Several systematic reviews and meta-analyses over the past decade have examined the effects of LCDs, unanimously showing superior weight loss to LFDs [136,138–145], with mean differences ranging 1.01–2.64 kg.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Low-fat and low-carbohydrate diets
What the sources say
- Partly supportedcites [136] Chawla S, Tessarolo Silva F, Amaral Medeiros S, et al. The effect of low-fat and low-carbohydrate diets on weight loss and lipid levels: a systematic review and meta-analysis. Nutrients. 2020; 12(12): 3774. doi: 10.3390/nu12123774 PMC7763365 33317019 sourceExperimental — accuracy not yet measured
The Results (§3.2) report greater overall weight loss with low-carbohydrate diets (mean difference 1.00 kg) and a significant advantage at 6–12 months (1.30 kg). The Discussion says several earlier meta-analyses found a similar benefit, but this paper does not establish that reviews unanimously found superior weight loss or support the stated 1.01–2.64 kg range; its differences were not statistically significant at other follow-up periods. (LLM, conf=0.88)
- Supportedcites [138] Tobias DK, Chen M, Manson JE, et al. Effect of low-fat diet interventions versus other diet interventions on long-term weight change in adults: a systematic review and meta-analysis. Lancet Diabetes Endocrinol. 2015; 3(12): 968– 979. doi: 10.1016/S2213-8587(15)00367-8 PMC4667723 26527511 source
The Results report that low-carbohydrate interventions produced 1.15 kg greater long-term weight loss than low-fat interventions in weight-loss trials. That estimate falls within the citing sentence’s 1.01–2.64 kg range. The claim of unanimity concerns the cited reviews collectively, not this paper alone. (LLM, conf=0.91)
- Supportedcites [139] Sackner-Bernstein J, Kanter D, Kaul S. Dietary intervention for overweight and obese adults: comparison of low-carbohydrate and low-fat diets. A meta-analysis. PLoS One. 2015; 10(10): e0139817. doi: 10.1371/journal.pone.0139817 PMC4618935 26485706 source
The Abstract’s Data Synthesis reports that low-carbohydrate diets produced significantly greater weight loss than low-fat diets, with a mean difference of 2.0 kg—within the cited range. This meta-analysis supports its contribution to the multi-citation sentence. (LLM, conf=0.90)
- Partly supportedcites [140] Mansoor N, Vinknes KJ, Veierod MB, et al. Effects of low-carbohydrate diets v. Low-fat diets on body weight and cardiovascular risk factors: a meta-analysis of randomised controlled trials. Br J Nutr. 2016; 115(3): 466– 479. doi: 10.1017/S0007114515004699 26768850 sourceExperimental — accuracy not yet measured
The Abstract (p. 1) reports 2.17 kg greater weight loss with low-carbohydrate diets, which falls within the claimed range. But the introduction (p. 2) describes a lack of consensus among previous meta-analyses; this paper does not establish that reviews unanimously found superior weight loss or document the stated 1.01–2.64 kg range. (LLM, conf=0.86)
- Not checked — no full text of the sourcecites [141] Hashimoto Y, Fukuda T, Oyabu C, et al. Impact of low-carbohydrate diet on body composition: meta-analysis of randomized controlled studies. Obes Rev. 2016; 17(6): 499– 509. doi: 10.1111/obr.12405 27059106 source
- Partly supportedcites [142] Lei L, Huang J, Zhang L, et al. Effects of low-carbohydrate diets versus low-fat diets on metabolic risk factors in overweight and obese adults: a meta-analysis of randomized controlled trials. Front Nutr. 2022; 9: 935234. doi: 10.3389/fnut.2022.935234 PMC9397119 36017224 sourceExperimental — accuracy not yet measured
The Results section (weight loss; page not provided) reports greater overall weight loss with low-carbohydrate diets than with low-fat diets (WMD −1.33 kg), within the claimed range. But it reports no difference at 24 months and does not establish that the cited reviews unanimously found superiority or that their mean differences spanned 1.01–2.64 kg. (LLM, conf=0.87)
- Partly supportedcites [143] Silverii GA, Cosentino C, Santagiuliana F, et al. Effectiveness of low-carbohydrate diets for long-term weight loss in obese individuals: a meta-analysis of randomized controlled trials. Diabetes Obes Metab. 2022; 24(8): 1458– 1468. doi: 10.1111/dom.14709 PMC9546386 35373905 sourceExperimental — accuracy not yet measured
The Results (Weight loss; page not provided) report greater weight loss with low-carbohydrate diets at 3–4 and 6–8 months, including a mean difference of 2.64 kg. But the comparison was with non-carbohydrate-restricted diets, not specifically low-fat diets, and the advantage was not significant at later time points. The copy does not establish unanimous findings across reviews or the lower end of the stated 1.01–2.64 kg range. (LLM, conf=0.88)
- Not checked — no full text of the sourcecites [144] Yang Q, Lang X, Li W, et al. The effects of low-fat, high-carbohydrate diets vs. Low-carbohydrate, high-fat diets on weight, blood pressure, serum liquids and blood glucose: a systematic review and meta-analysis. Eur J Clin Nutr. 2022; 76(1): 16– 27. doi: 10.1038/s41430-021-00927-0 34168293 source
- Partly supportedcites [145] Feng S, Liu R, Thompson C, et al. Effects of carbohydrate-restricted diets and macronutrient replacements on cardiovascular health and body composition in adults: a meta-analysis of randomized trials. AJCN. 2025; 122(5): 1461– 1478. doi: 10.1016/j.ajcnut.2025.09.012 PMC12799388 40935153 sourceExperimental — accuracy not yet measured
The Results (Subgroup analyses: macronutrient composition; page unavailable) report reductions in body weight with carbohydrate-restricted diets, and the Discussion says stricter diets produced greater weight loss. But the Introduction describes prior findings as inconsistent, including studies with no significant body-weight improvement. The paper does not establish that reviews unanimously found low-carbohydrate diets superior to low-fat diets or report the claimed 1.01–2.64 kg range. (LLM, conf=0.88)
boosteddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“Furthermore, in a systematic review and meta-analysis of 33 RCTs, Lei et al. [142] found that LCDs statistically reduced body weight at 6–23 months (mean difference of −1.33 kg), but no statistically significant difference was observed at 24 months.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Low-fat and low-carbohydrate diets
What the sources say
- Partly supportedcites [142] Lei L, Huang J, Zhang L, et al. Effects of low-carbohydrate diets versus low-fat diets on metabolic risk factors in overweight and obese adults: a meta-analysis of randomized controlled trials. Front Nutr. 2022; 9: 935234. doi: 10.3389/fnut.2022.935234 PMC9397119 36017224 sourceExperimental — accuracy not yet measured
Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“In a systematic review and meta-analysis of 25 RCTs, Silverii et al. [143] reported that, compared to control diets, LCDs statistically reduced body weight at 3–4 and 6–8 months, but the difference was no longer statistically significant at 10–14 and 18–30 months.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Low-fat and low-carbohydrate diets
What the sources say
- Supportedcites [143] Silverii GA, Cosentino C, Santagiuliana F, et al. Effectiveness of low-carbohydrate diets for long-term weight loss in obese individuals: a meta-analysis of randomized controlled trials. Diabetes Obes Metab. 2022; 24(8): 1458– 1468. doi: 10.1111/dom.14709 PMC9546386 35373905 source
Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Continuing these findings, a large (61-RCT) systematic review by Naude et al. [147] reported that in trials lasting 3 to < 12 months, the average difference in weight loss between LCDs and control diets was 1 kg, and in trials lasting 12 months or more, the average difference was less than 1 kg.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Low-fat and low-carbohydrate diets
What the sources say
- Supportedcites [147] Naude CE, Brand A, Schoonees A, et al. Low-carbohydrate versus balanced-carbohydrate diets for reducing weight and cardiovascular risk. Cochrane Database Syst Rev. 2022; 1(1): CD013334. doi: 10.1002/14651858.CD013334.pub2 PMC8795871 35088407 source
The Results (Description of studies; page unavailable) identify a 61-trial review. In Results (Effects of interventions; page unavailable), the reported mean weight-loss differences are about 1 kg at three to <12 months (−1.07 kg in 37 trials without type 2 diabetes and −1.26 kg in 14 trials with it); the reported long-term differences include −0.93 kg at one to two years. These support the citing sentence’s rounded summary, though the estimates come from subsets of the 61 trials. (LLM, conf=0.90)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Carbohydrate intakes at 12 months in the carbohydrate-restricted and fat-restricted groups were 132.4 g and 212.9 g, respectively. Fat intakes at 12 months were 86.2 g and 57.3 g, respectively.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Low-fat and low-carbohydrate diets
What the sources say
- Supportedcites [135] Gardner CD, Trepanowski JF, Del Gobbo LC, et al. Effect of low-fat vs low-carbohydrate diet on 12-Month weight loss in overweight adults and the association with genotype pattern or insulin secretion: the DIETFITS randomized clinical trial. J Am Med Assoc. 2018; 319(7): 667– 679. doi: 10.1001/jama.2018.0245 PMC5839290 29466592 source
Table 2 (Dietary Intake by Time Point; page not provided in our copy) reports 12-month carbohydrate intakes of 132.4 g in the healthy low-carbohydrate group and 212.9 g in the healthy low-fat group. It also reports fat intakes of 86.2 g and 57.3 g, respectively. (LLM, conf=0.95)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“At 12 months, the low-carbohydrate and low-fat groups showed moderate reductions in body weight (5.29 and 5.99 kg, respectively), with no statistically significant between-group differences.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Low-fat and low-carbohydrate diets
What the sources say
- Partly supportedcites [135] Gardner CD, Trepanowski JF, Del Gobbo LC, et al. Effect of low-fat vs low-carbohydrate diet on 12-Month weight loss in overweight adults and the association with genotype pattern or insulin secretion: the DIETFITS randomized clinical trial. J Am Med Assoc. 2018; 319(7): 667– 679. doi: 10.1001/jama.2018.0245 PMC5839290 29466592 sourceExperimental — accuracy not yet measured
Table 3 reports 12-month weight reductions of 5.29 kg in the healthy low-fat group and 5.99 kg in the healthy low-carbohydrate group—the reverse of the claim’s group assignments. The Primary Outcome section confirms that the between-group difference was not statistically significant. (LLM, conf=0.94)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“A subsequent analysis by Martins et al. [202] included the previous plus another study and found that AT after weight loss (~12 kg via 800 kcal/day diet) was −46 kcal, and estimated that each 10-kcal/day increase in AT delayed the time to reach weight loss goals by one day.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Adaptive thermogenesis
What the sources say
- Supportedcites [202] Martins C, Gower BA, Hunter GR. Metabolic adaptation delays time to reach weight loss goals. Obesity (Silver Spring). 2022; 30(2): 400– 406. doi: 10.1002/oby.23333 PMC8852805 35088553 source
The Study design section says this secondary analysis combined diet-only participants from two studies and used an 800-kcal/day diet. The Results report average weight loss of 12.5 kg and metabolic adaptation of −46 kcal/day; the Discussion estimates one additional day to reach the weight-loss goal for each 10-kcal/day increase in metabolic adaptation. (LLM, conf=0.94)
hedgeddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Physical adaptations to weight loss refer to the increased efficiency and lower energetic cost of movement (in both exercise and non-exercise activity) in a body with less mass than before [176].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Physical & physiological adaptations
What the sources say
- Supportedcites [176] Most J, Redman LM. Impact of calorie restriction on energy metabolism in humans. Exp Gerontol. 2020; 133: 110875. doi: 10.1016/j.exger.2020.110875 PMC9036397 32057825 source
The Physical activity section says that calorie restriction reduces energy expenditure during activity and that this may reflect both smaller body mass and improved movement economy. It reports lower energy cost of walking and greater mechanical efficiency while pedaling after weight loss, covering non-exercise and exercise movement. (LLM, conf=0.90)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“Martin et al. [187] conducted a secondary analysis of the CALERIE study [188]. Body composition and metabolic changes were examined over 12 months of caloric restriction (25% deficit) in 109 subjects. As a result of ~11% weight loss (8 kg), the RMR was reduced by ~100 kcal (~7%) in healthy normal weight and overweight subjects. The intriguing finding was that only 60% of the reduction in RMR (60”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Physical & physiological adaptations
What the sources say
- Supportedcites [187] Martin A, Fox D, Murphy CA, et al. Tissue losses and metabolic adaptations both contribute to the reduction in resting metabolic rate following weight loss. Int J Obes (Lond). 2022; 46(6): 1168– 1175. doi: 10.1038/s41366-022-01090-7 PMC9151388 35181758 source
Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
- Supportedcites [188] Kraus WE, Bhapkar M, Huffman KM, et al. 2 years of calorie restriction and cardiometabolic risk (CALERIE): exploratory outcomes of a multicentre, phase 2, randomised controlled trial. Lancet Diabetes Endocrinol. 2019; 7(9): 673– 683. doi: 10.1016/S2213-8587(19)30151-2 PMC6707879 31303390 source
Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
plaindirectn = 109- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“While this might help explain the high rate of weight regain among dieters, a subsequent “settling point” theory evolved based on the possibility of “settling” into a new body weight, on the basis of changing lifestyle and habits [219].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Weight loss plateaus > Weight loss plateaus: theory
What the sources say
- Supportedcites [219] Speakman JR, Levitsky DA, Allison DB, et al. Set points, settling points and some alternative models: theoretical options to understand how genes and environments combine to regulate body adiposity. Dis Model Mech. 2011; 4(6): 733– 745. doi: 10.1242/dmm.008698 PMC3209643 22065844 source
In “The settling point regulation model” (page unavailable), the paper explains that body fat can settle at an equilibrium determined by food intake and energy expenditure. Its example shows weight stabilizing at a lower level while intake remains reduced; it also identifies physical activity as a possible determinant. This supports the paraphrase that changed habits can lead to a new body weight. (LLM, conf=0.90)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
- Supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“This presumption has received reinforcement from the findings of Fothergill et al. [200], who examined the metabolic effects of substantial weight loss in competitors in the televised Biggest Loser competition. Weight loss at the end of the 30-week competition averaged 58.3 kg, at which point the measured REE was lower than the predicted REE (−275 kcal), indicating significant AT. At the 6-year”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Adaptive thermogenesis
What the sources say
- Partly supportedcites [200] Fothergill E, Guo J, Howard L, et al. Persistent metabolic adaptation 6 years after "The biggest Loser" competition. Obesity (Silver Spring). 2016; 24(8): 1612– 1619. doi: 10.1002/oby.21538 PMC4989512 27136388 sourceExperimental — accuracy not yet measured
Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.
hedgedcorrelational- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“AT is commonly cited as a 10%–15% reduction beyond predicted reductions in REE [194], but the current evidence shows that this may be a significant overestimation, especially in weight-stable conditions [195,196].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Adaptive thermogenesis
What the sources say
- Partly supportedcites [194] Rosenbaum M, Leibel RL. Adaptive thermogenesis in humans. Int J Obes (Lond). 2010; 34 (Suppl 1): S47– 55. doi: 10.1038/ijo.2010.184 PMC3673773 20935667 sourceExperimental — accuracy not yet measured
The Introduction reports a 10–15% reduction below predicted values in total energy expenditure during reduced-weight maintenance, supporting the figure but not its attribution to REE. It separately says REE reductions account for about 10–15% of the decline in total energy expenditure in some studies, while other studies find no REE change. The later claim about overestimation is attached to other citations, not this source. (LLM, conf=0.88)
- Supportedcites [195] Nunes CL, Casanova N, Francisco R, et al. Does adaptive thermogenesis occur after weight loss in adults? A systematic review. Br J Nutr. 2022; 127(3): 451– 469. doi: 10.1017/S0007114521001094 33762040 source
The citation supports the second clause, not the 10%–15% figure, which is cited separately. The Conclusions (page unavailable) say AT values may be small or non-significant in higher-quality studies and seem attenuated or absent after weight stabilization or neutral energy balance, supporting the qualified claim of possible overestimation. (LLM, conf=0.92)
- Supportedcites [196] Martins C, Roekenes J, Salamati S, et al. Metabolic adaptation is an illusion, only present when participants are in negative energy balance. AJCN. 2020; 112(5): 1212– 1218. doi: 10.1093/ajcn/nqaa220 PMC7657334 32844188 source
The citation to this paper attaches to the claim that the commonly cited estimate may be too high, especially under weight-stable conditions—not to the 10%–15% figure, which has a separate citation. The Discussion reports that adaptation below predicted resting metabolic rate fell from about 90 kcal/day immediately after weight loss to 38 kcal/day after four weeks of weight stabilization, supporting that qualified claim. (LLM, conf=0.91)
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
The cited sources support only part of this claim — read each source’s verdict below.
In the paper
“A systematic review and meta-analysis by Jin et al. [189] examined appetite-related gut hormone changes after weight loss. An average weight loss of 6%–7% was observed across studies, and this loss was associated with increased ghrelin and decreased peptide YY (PYY) GLP-1.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Physical & physiological adaptations
What the sources say
- Partly supportedcites [189] Jin Z, Li J, Thackray AE, et al. Fasting appetite-related gut hormone responses after weight loss induced by calorie restriction, exercise, or both in people with overweight or obesity: a meta-analysis. Int J Obes (Lond). 2025; 49(5): 776– 792. doi: 10.1038/s41366-025-01726-4 PMC12095072 39929932 sourceExperimental — accuracy not yet measured
The Results (Search results) report average weight losses of 6% in RCTs and 7% in non-RCTs. The Abstract (Results) reports increased total ghrelin, but decreased PYY and active GLP-1 only in non-RCTs; the Discussion says total GLP-1 did not change and PYY findings varied. The claim omits those distinctions and makes the hormone pattern sound general across studies. (LLM, conf=0.88)
plaincorrelational- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Partly supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“The 4 components of total daily energy expenditure (TDEE) and their proportional contributions are as follows [104]: 1)Thermic effect of food (TEF): 8%–15%2)Exercise activity thermogenesis (EAT): 15%–30%3)Non-exercise activity thermogenesis (NEAT): 15%–50%4)Resting energy expenditure (REE): 60%–70%”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Physical & physiological adaptations
What the sources say
- Supportedcites [104] Aragon AA, Schoenfeld BJ, Wildman R, et al. International society of sports nutrition position stand: diets and body composition. J Int Soc Sports Nutr. 2017; 14: 16. doi: 10.1186/s12970-017-0174-y PMC5470183 28630601 source
In the Calories in/calories Out (CICO) section, Table 3 gives TEF as 8–15%, EAT as 15–30%, NEAT as 15–50%, and BMR as 60–70% of TDEE. The accompanying text says REE is often used interchangeably with BMR, supporting the citing sentence’s use of REE, while noting a technical distinction between the two measures. (LLM, conf=0.89)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
- Supported
Every source the paper cites for this claim was checked and supports it.
In the paper
“The primary metabolic adaptation to hypoenergetic balance is a decrease (not an increase) in energy expenditure, hence the proposal in a previous publication to re-name this phenomenon adaptive thermoreduction [104].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Adaptive thermogenesis
What the sources say
- Supportedcites [104] Aragon AA, Schoenfeld BJ, Wildman R, et al. International society of sports nutrition position stand: diets and body composition. J Int Soc Sports Nutr. 2017; 14: 16. doi: 10.1186/s12970-017-0174-y PMC5470183 28630601 source
The ‘Adaptations to overfeeding’ section says that under hypocaloric conditions, energy expenditure falls in response to reduced intake and that ‘adaptive thermogenesis’ would more accurately be called ‘adaptive thermoreduction.’ The ‘Calories in/calories Out’ section likewise says energy expenditure tends to decrease under hypocaloric conditions. The supplied passages do not provide page numbers. (LLM, conf=0.94)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Supported
The sources with a verdict support this claim; the rest weren’t checked yet, have no full text we could read, or their verdicts aren’t rated yet.
In the paper
“On a final note, screen time (TV, desktop device, mobile phone) can be a significant barrier to physical activity [209], healthy sleep patterns, and psychological health [210].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Non-exercise activity thermogenesis (NEAT)
What the sources say
- Not checked yetcites [209] Bonilla DA, Peralta-Alzate JO, Bonilla-Henao JA, et al. Insights into non-exercise physical activity on control of body mass: a review with practical recommendations. J Funct Morphol Kinesiol. 2023; 8(2): 44. doi: 10.3390/jfmk8020044 PMC10123606 37092376
- Supportedcites [210] Nakshine VS, Thute P, Khatib MN, et al. Increased screen time as a cause of declining physical, psychological health, and sleep patterns: a literary review. Cureus. 2022; 14(10): e30051. doi: 10.7759/cureus.30051 PMC9638701 36381869 source
Citation [210] is attached to the claim about healthy sleep patterns and psychological health; the physical-activity clause has a separate citation. The Review’s “Effects on sleep” section describes ways screen use disrupts sleep, while “Depression and suicidal behavior” links nighttime screen use with depressive symptoms and other psychological harms. No page numbers are provided in our copy. (LLM, conf=0.91)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Very-low-energy diets (<800 kcal/day) and low-energy diets (800–1200 kcal/day) produce greater short-term weight loss but lack long-term advantages over less aggressive energy restrictions, such as calorie-controlled diets.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Position of the International Society of Sports Nutrition (ISSN)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: unclear — It is unclear why the paper says it holds.
It may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Ketogenic diets are effective at bodyweight and body fat reduction, but they also tend to decrease fat-free mass to a greater degree than higher-carbohydrate comparators, particularly in shorter trials where glycogen and total body water shifts can influence estimates.”
- Also stated in: § Summary and conclusions · plain
“Ketogenic diets are highly effective at body weight reduction, but they also tend to decrease fat-free mass to a greater degree (particularly in shorter trials where glycogen and total body water shifts can influence estimates) than higher-carbohydrate comparators.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Position of the International Society of Sports Nutrition (ISSN)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Also stated in: § Summary and conclusions · plain
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Total daily protein is of primary importance; specific distribution of the constituent doses is a secondary concern.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Abstract
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Rests on an assumption: Findings from overweight/obese clinical populations can be extrapolated to healthy, physically active, and/or athletic adults when the evidence base is primarily clinical.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“although macronutrient quality plays an independent role in optimizing body composition and metabolic health.”
- Also stated in: § Position of the International Society of Sports Nutrition (ISSN) · plain
“although macronutrient quality plays an independent role in optimizing body composition and metabolic health.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Abstract
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper may give no reason why it holds.
- Rests on an assumption: Findings from overweight/obese clinical populations can be extrapolated to healthy, physically active, and/or athletic adults when the evidence base is primarily clinical.
- Also stated in: § Position of the International Society of Sports Nutrition (ISSN) · plain
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“For the general population, a daily protein intake of 1.2–1.6 g/kg BW is appropriate for supporting total body weight and fat loss, physical activity, and imparting benefits to musculoskeletal and cardiometabolic health.”
- Also stated in: § Position of the International Society of Sports Nutrition (ISSN) · plain
“For the general population, a daily protein intake of 1.2–1.6 g/kg BW is appropriate for supporting total body weight and fat loss, physical activity, and imparting benefits to musculoskeletal and cardiometabolic health.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Abstract
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim.
- Rests on an assumption: Findings from overweight/obese clinical populations can be extrapolated to healthy, physically active, and/or athletic adults when the evidence base is primarily clinical.
- Also stated in: § Position of the International Society of Sports Nutrition (ISSN) · plain
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Much of the long-term weight loss literature derives from overweight/obese clinical populations. Extrapolation to lean, athletic, or resistance-trained individuals should be interpreted within that specific context.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Background
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“VLEDs and LEDs produce substantial and rapid weight loss, with VLEDs generally producing greater short-term weight loss than does less aggressive energy restriction.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Key findings for the magnitude of the energy deficit
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Weight regain is common following VLEDs, and differences in weight loss compared with less aggressive energy restriction are substantially attenuated with longer-term follow-up.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Key findings for the magnitude of the energy deficit
plaincorrelational- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“The evidence was appraised qualitatively (no formal GRADE process was applied).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Methods
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
In the paper
“For elite wrestlers, Miranda et al. [54] found that gradual weight loss was not associated with reductions in isokinetic peak torque and was accompanied by reduced body fat and preserved lean mass.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Non-VLED/LED research related to the magnitude of the deficit
What the sources say
- Not checked — no full text of the sourcecites [54] Miranda KA, Gheller RG, IM DAS, et al. Effects of gradual weight loss on strength levels and body composition in wrestlers athletes. J Sports Med Phys Fitness. 2021; 61(3): 401– 406. doi: 10.23736/S0022-4707.20.11254-4 33092323 source
plaincorrelational- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“The collective evidence therefore suggests that healthy BF% targets for men and women are approximately 11%–22% and 20%–35%, respectively.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Background
hedged- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Collectively, VLEDs and LEDs result in weight losses of 10%–15%, with typical losses of 10–16 kg [30].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Very low-energy diets (VLEDs) and low-energy diets (LEDs)
What the sources say
- Not checked yetcites [30] Brown A, Leeds AR. Very low-energy and low-energy formula diets: effects on weight loss, obesity co-morbidities and type 2 diabetes remission – an update on the evidence for their use in clinical practice. Nutr Bull. 2019; 44(1): 7– 24. doi: 10.1111/nbu.12372
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Although BMI has utility as a screening tool at the population level, its utility for assessing health/fitness at the individual level is limited.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Background
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“In another recent network meta-analysis, Ma et al. [68] also found superior weight loss with ADF compared to CER, but fat mass changes were similar across the IF variants (ADF, TWF, and TRE).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Not checked — no full text of the sourcecites [68] Ma Y, Sun L, Mu Z. Network meta-analysis of three different forms of intermittent energy restrictions for overweight or obese adults. Int J Obes (Lond). 2024; 48(1): 55– 64. doi: 10.1038/s41366-023-01416-z 37980382 source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“Additional potential adverse effects include gallstones [48], hypotension [46], cold intolerance, and hair loss [44].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Very low-energy diets (VLEDs) and low-energy diets (LEDs)
What the sources say
- Not checked yetcites [48] Delbridge E, Proietto J. State of the science: VLED (Very Low Energy Diet) for obesity. Asia Pac J Clin Nutr. 2006; 15 Suppl: 49– 54. 16928661
- Not checked yetcites [46] Ahmed W, Flynn MA, Alpert MA. Cardiovascular complications of weight reduction diets. Am J Med Sci. 2001; 321(4): 280– 284. doi: 10.1097/00000441-200104000-00007 11307868
- Not checked — no full text of the sourcecites [44] Tsai AG, Wadden TA. The evolution of very-low-calorie diets: an update and meta-analysis. Obesity (Silver Spring). 2006; 14(8): 1283– 1293. doi: 10.1038/oby.2006.146 16988070 source
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“More aggressive energy restriction may increase the risk of lean-mass loss, particularly in lean individuals, although adequate protein intake and resistance training can mitigate this risk.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Key findings for the magnitude of the energy deficit
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Another trial in this context by Garthe et al. [53] compared the effects of slow (0.7% per week) versus fast (1.4% per week) weight loss in elite athletes in a mix of sports. The results indicated that fat mass decreased to a statistically similar magnitude in both groups, but lean mass increased in the slow weight loss condition, and remained unchanged in the fast weight loss condition.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Non-VLED/LED research related to the magnitude of the deficit
What the sources say
- Not checked — no full text of the sourcecites [53] Garthe I, Raastad T, Refsnes PE, et al. Effect of two different weight-loss rates on body composition and strength and power-related performance in elite athletes. Int J Sport Nutr Exerc Metab. 2011; 21(2): 97– 104. doi: 10.1123/ijsnem.21.2.97 21558571 source
hedgeddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This may provide clinical utility when substantial weight reduction is desired over a relatively short period, particularly in individuals with obesity.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Key findings for the magnitude of the energy deficit
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim.
In the paper
“reported greater short-term weight loss with VLEDs (16.1%) versus LEDs (9.7%), but there was no statistically significant difference in the long-term weight loss between the diet types (6.3% vs 5.0%).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Very low-energy diets (VLEDs) and low-energy diets (LEDs)
What the sources say
- Not checked — no full text of the sourcecites [44] Tsai AG, Wadden TA. The evolution of very-low-calorie diets: an update and meta-analysis. Obesity (Silver Spring). 2006; 14(8): 1283– 1293. doi: 10.1038/oby.2006.146 16988070 source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Systematic reviews/meta-analyses and randomized controlled trials were prioritized when available, supplemented by controlled feeding studies and relevant mechanistic work.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Methods
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Aggressive caloric deficits raise the risk of lean mass loss, and among the IF variants, ADF may be the least conducive to lean mass preservation (especially in normal-weight or lean individuals).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“However, gradual weight loss resulted in modestly greater reductions in fat mass (1 kg), body fat percentage (0.83%), and better preservation of resting metabolic rate (97.32 kcal).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of the magnitude of the energy deficit > Non-VLED/LED research related to the magnitude of the deficit
What the sources say
- Not checked — no full text of the sourcecites [52] Ashtary-Larky D, Bagheri R, Abbasnezhad A, et al. Effects of gradual weight loss v. Rapid weight loss on body composition and RMR: a systematic review and meta-analysis. Br J Nutr. 2020; 124(11): 1121– 1132. doi: 10.1017/S000711452000224X 32576318 source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“The preservation of lean mass can thus preserve energy expenditure, immune function, and proper utilization/partitioning of metabolic fuels.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Background
plainconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: unclear — It is unclear why the paper says it holds.
It may state two separate claims as one.
In the paper
“In contrast, Derron et al. [73] recently reported greater fat loss with ADF than with time-restricted eating (TRE) in adults without obesity; however, the ADF group spontaneously reduced energy intake by approximately 34% versus 15% with TRE, whereas Templeman et al. [72] matched energy deficits between ADF and continuous restriction.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Not checked — no full text of the sourcecites [73] Derron N, Guntner AT, Weber IC, et al. Alternate-day fasting elicits larger changes in fat mass than time-restricted eating in adults without obesity - A randomized clinical trial. Clin Nutr. 2025; 53: 212– 221. doi: 10.1016/j.clnu.2025.08.033 40945487 source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“The reference lists of the included papers were hand-searched for additional citations.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Methods
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
In the paper
“Higher meal frequencies were associated with greater losses of fat mass and retention of lean mass.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Influence of within-day meal frequency
What the sources say
- Not checked — no full text of the sourcecites [81] Schoenfeld BJ, Aragon AA, Krieger JW. Effects of meal frequency on weight loss and body composition: a meta-analysis. Nutr Rev. 2015; 73(2): 69– 82. doi: 10.1093/nutrit/nuu017 26024494 source
plaincorrelational- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“A systematic review and meta-analysis by Ashtary-Larky et al. [77] included 8 trials ranging from 4 to 12 weeks, examining the effect of resistance training on IF regimens (2 ADF, 6 TRE trials). Relative to controls, the mean body weight and body fat reductions via IF were 2.08 and 1.36 kg, respectively. The change in lean mass (−0.27 kg) was not statistically significant compared to control”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Intermittent fasting
What the sources say
- Not checked — no full text of the sourcecites [77] Ashtary-Larky D, Bagheri R, Tinsley GM, et al. Effects of intermittent fasting combined with resistance training on body composition: a systematic review and meta-analysis. Physiol Behav. 2021; 237: 113453. doi: 10.1016/j.physbeh.2021.113453 33984329 source
plaindirect- Asserted: passes — The authors put it forward as true.
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- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“The TEF of protein, carbohydrate, and fat is approximately 20%–30%, 5%–10%, and 0%–3%, respectively [93].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Not checked yetcites [93] Tappy L. Thermic effect of food and sympathetic nervous system activity in humans. Reprod Nutr Dev. 1996; 36(4): 391– 397. doi: 10.1051/rnd:19960405 8878356
plain- Asserted: passes — The authors put it forward as true.
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- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“The joint position stand of the Academy of Nutrition and Dietetics, Dietitians of Canada, and American College of Sports Medicine recommends 1.2–2.0 g/kg [103] for physically active and athletic populations.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Not checked yetcites [103] Thomas DT, Erdman KA, Burke LM. American college of sports Medicine joint position statement. Nutrition and athletic performance. Med Sci Sports Exerc. 2016; 48(3): 543– 568. doi: 10.1249/MSS.0000000000000852 26891166
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Some individual trials report greater weight or fat loss, particularly with high-protein protocols, but these effects cannot be attributed to fasting per se and are not consistently observed.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Key findings of continuous versus intermittent energy deficits
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“However, this protective effect is apparently not durable; training adaptations may still be compromised by chronically inadequate nutritional support, even at moderate deficits.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Influence of within-day meal frequency
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“In acute interventions, protein consistently increases fullness, and decreases hunger and the desire to eat [94].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
What the sources say
- Not checked — no full text of the sourcecites [94] Kohanmoo A, Faghih S, Akhlaghi M. Effect of short- and long-term protein consumption on appetite and appetite-regulating gastrointestinal hormones, a systematic review and meta-analysis of randomized controlled trials. Physiol Behav. 2020; 226: 113123. doi: 10.1016/j.physbeh.2020.113123 32768415 source
plaindirect- Asserted: passes — The authors put it forward as true.
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- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“It bears emphasis that total daily protein is of primary importance, with distribution of the constituent doses being of secondary importance (and bet left to individual preference and long-term sustainability).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Key findings of continuous versus intermittent energy deficits
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“However, a caveat to these findings is that the majority of studies did not report actual protein intake, and there was high heterogeneity of protein intake assignment across studies.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Influence of within-day meal frequency
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Alternate-day fasting may produce somewhat greater weight loss, potentially owing to a larger net energy deficit, but may also increase lean mass loss.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Key findings of continuous versus intermittent energy deficits
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“It is worth emphasizing that the upper end of these ranges is primarily supported in lean, resistance-trained populations and may not apply to individuals with higher body fat percentages or non-training populations.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > High-protein diets
hedged- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Resistance training and purposefully limiting weekly fasting days to three or fewer can mitigate this risk.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Key findings of continuous versus intermittent energy deficits
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Schoenfeld and Aragon [88] proposed that MPS (and in turn, muscle hypertrophy) is maximized via protein dosed at 0.4–0.55 g/kg per meal over the course of at least 4 meals to a total of 1.6–2.2 g/kg/day.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Influence of within-day meal frequency
What the sources say
- Not checked yetcites [88] Schoenfeld BJ, Aragon AA. How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution. J Int Soc Sports Nutr. 2018; 15: 10. doi: 10.1186/s12970-018-0215-1 PMC5828430 29497353
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim.
In the paper
“However, sensitivity analysis revealed that the removal of a single, 2-week study in boxers [82] eliminated the statistical effect of meal frequency on changes in body composition, leading to the conclusion that the small difference in magnitude of effect between meal frequencies has limited practical significance.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Continuous vs intermittent energy deficits > Influence of within-day meal frequency
What the sources say
- Not checked yetcites [82] Iwao S, Mori K, Sato Y. Effects of meal frequency on body composition during weight control in boxers. Scand J Med Sci Sports. 1996; 6(5): 265– 272. doi: 10.1111/j.1600-0838.1996.tb00469.x 8960647
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Along similar lines, a meta-analysis by Hashimoto et al. [141] found that in >12-month studies, KDs did not result in statistically greater weight loss (0.44 kg), but fat loss was statistically significant (0.97 kg).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked — no full text of the sourcecites [141] Hashimoto Y, Fukuda T, Oyabu C, et al. Impact of low-carbohydrate diet on body composition: meta-analysis of randomized controlled studies. Obes Rev. 2016; 17(6): 499– 509. doi: 10.1111/obr.12405 27059106 source
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“The authors acknowledged the possibility that KD’s fat loss advantage was protein-mediated, since protein intakes in LCDs and KDs tended to be higher than those of control diets.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked — no full text of the sourcecites [141] Hashimoto Y, Fukuda T, Oyabu C, et al. Impact of low-carbohydrate diet on body composition: meta-analysis of randomized controlled studies. Obes Rev. 2016; 17(6): 499– 509. doi: 10.1111/obr.12405 27059106 source
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
In the paper
“A subsequent 18-RCT meta-analysis by Koerich et al. [164] found that in athletes and trained subjects, KD resulted in statistically significant reductions in body weight (2.4 kg) and fat mass (2.4 kg) losses, but also greater lean mass losses (0.8 kg) compared to control diets in trials ranging from 4 days to 12 weeks.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked yetcites [164] Koerich ACC, Borszcz FK, Thives Mello A, et al. Effects of the ketogenic diet on performance and body composition in athletes and trained adults: a systematic review and Bayesian multivariate multilevel meta-analysis and meta-regression. Crit Rev Food Sci Nutr. 2023; 63(32): 11399– 11424. doi: 10.1080/10408398.2022.2090894 35757868
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Ketosis (also referred to as nutritional ketosis) is a relatively benign state distinct from ketoacidosis, which is the pathological and potentially life-threatening overproduction of ketones in the absence of exogenous insulin [149].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not matchedcites [149] Ghimire P, Dhamoon AS. Ketoacidosis. Treasure Island, FL: StatPearls; 2025.
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
- Not matched
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“The protein content of the KD is generally advised to be moderate to preserve a state of ketosis by minimizing gluconeogenesis.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
None of the sources cited for this claim have been checked yet.
In the paper
“Reduced insulin secretion and circulating insulin concentrations (and concomitant increase in lipolysis) are another commonly proposed mechanism underpinning the body weight reduction effectiveness of the KD.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked yetcites [158] Taubes G. The science of obesity: what do we really know about what makes us fat? An essay by gary taubes. Brit Med J. 2013; 346: f1050– f1050. doi: 10.1136/bmj.f1050 23596125
- Not checked — no full text of the sourcecites [159] Ludwig DS, Friedman MI. Increasing adiposity: consequence or cause of overeating? J Am Med Assoc. 2014; 311(21): 2167– 2168. doi: 10.1001/jama.2014.4133 24839118 source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Higher-protein diets improve weight loss outcomes by enhancing satiety, increasing the thermic effect of feeding, and supporting lean mass retention.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Key findings for macronutrient composition
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“A 13-RCT systematic review and meta-analysis by Ashtary-Larky et al. [163] limited to resistance trainees found significant advantages of KDs over control diets for reductions in body weight (3.67 kg) and fat mass (2.21 kg). However, fat-free mass was reduced by 1.26 kg compared to controls.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked — no full text of the sourcecites [163] Ashtary-Larky D, Bagheri R, Asbaghi O, et al. Effects of resistance training combined with a ketogenic diet on body composition: a systematic review and meta-analysis. Crit Rev Food Sci Nutr. 2022; 62(21): 5717– 5732. doi: 10.1080/10408398.2021.1890689 33624538 source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“A 13-study systematic review by Coleman et al. [162] reported greater body weight reduction (2.7 vs. 0.3 kg) and body fat reduction (2.3 vs. 0.3 kg) in KDs compared to control diets in physically active subjects. Fat-free mass decreased by 0.3 kg in KD, but increased by 0.7 kg in the control diets.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked yetcites [162] Coleman JL, Carrigan CT, Margolis LM. Body composition changes in physically active individuals consuming ketogenic diets: a systematic review. J Int Soc Sports Nutr. 2021; 18(1): 41. doi: 10.1186/s12970-021-00440-6 PMC8180141 34090453
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“However, much of the early weight loss advantage of carbohydrate restriction appears to be from water loss via reduced glycogen storage, with minimal differences in fat loss compared to a non-ketogenic diet [146].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Low-fat and low-carbohydrate diets
What the sources say
- Not checked yetcites [146] Yang MU, Van Itallie TB. Composition of weight lost during short-term weight reduction. Metabolic responses of obese subjects to starvation and low-calorie ketogenic and nonketogenic diets. J Clin Invest. 1976; 58(3): 722– 730. doi: 10.1172/JCI108519 PMC333231 956398
hedgeddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“When energy intake and protein intake are comparable, low-carbohydrate and low-fat diets produce similar effects on weight loss and fat loss, indicating that macronutrient distribution is less important than sustained energy restriction and dietary adherence.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Key findings for macronutrient composition
hedged- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“The differences in fat loss between CKD and RD did not reach statistical significance, but the differences (1.9 and 4.0 kg, respectively) favored RD. Lean mass loss was statistically greater in CKD (−1.8 and −0.4 kg, respectively).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked yetcites [165] Kysel P, Haluzikova D, Dolezalova RP, et al. The influence of cyclical ketogenic reduction diet vs. Nutritionally balanced reduction diet on body composition, strength, and endurance performance in healthy young males: a randomized controlled trial. Nutrients. 2020; 12(9): 2832. doi: 10.3390/nu12092832 PMC7551961 32947920
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“This is the core premise of the carbohydrate-insulin model of obesity (CIM), which implicates carbohydrate as the primary insulinogenic agent, and thus the macronutrient to be minimized in the pursuit of body weight loss or prevention of weight gain [158,159].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked yetcites [158] Taubes G. The science of obesity: what do we really know about what makes us fat? An essay by gary taubes. Brit Med J. 2013; 346: f1050– f1050. doi: 10.1136/bmj.f1050 23596125
- Not checked — no full text of the sourcecites [159] Ludwig DS, Friedman MI. Increasing adiposity: consequence or cause of overeating? J Am Med Assoc. 2014; 311(21): 2167– 2168. doi: 10.1001/jama.2014.4133 24839118 source
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
In the paper
“The authors attributed the weight/fat loss advantages to the greater satiating effect of the higher protein content of KDs.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked yetcites [164] Koerich ACC, Borszcz FK, Thives Mello A, et al. Effects of the ketogenic diet on performance and body composition in athletes and trained adults: a systematic review and Bayesian multivariate multilevel meta-analysis and meta-regression. Crit Rev Food Sci Nutr. 2023; 63(32): 11399– 11424. doi: 10.1080/10408398.2022.2090894 35757868
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim.
In the paper
“A recent scoping review by Skartun et al. [171] reported that common, transient symptoms experienced during keto-induction (transition from a standard, high-carbohydrate diet to nutritional ketosis) in adult populations include the following: halitosis (38%), constipation (1%–68%), liver function abnormalities (24%), feelings of decreased energy (18%–25%), light-headedness/dizziness (15%–21%),”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked yetcites [171] Skartun O, Smith CR, Laupsa-Borge J, et al. Symptoms during initiation of a ketogenic diet: a scoping review of occurrence rates, mechanisms and relief strategies. Front Nutr. 2025; 12: 1538266. doi: 10.3389/fnut.2025.1538266 PMC11978633 40206956
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“These findings serve to strengthen the larger body of evidence that KDs excel in fat mass reduction, but are suboptimal for lean mass preservation [166].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked yetcites [166] Ashtary-Larky D, Bagheri R, Bavi H, et al. Ketogenic diets, physical activity and body composition: a review. Br J Nutr. 2022; 127(12): 1898– 1920. doi: 10.1017/S0007114521002609 PMC9244428 34250885
boosteddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Ketosis has been regarded as a unique and favorable metabolic state, due to lower plasma insulin concentrations and preferential use of fat as a primary fuel source [153].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Ketogenic diets
What the sources say
- Not checked yetcites [153] Dowis K, Banga S. The potential health benefits of the ketogenic diet: a narrative review. Nutrients. 2021; 13(5): 1654. doi: 10.3390/nu13051654 PMC8153354 34068325
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Ketogenic diets may provide modest advantages for weight and fat loss compared to higher-carbohydrate comparator diets, but these benefits tend to diminish over time, and may be accompanied by greater lean mass loss.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Key findings for macronutrient composition
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This highlights the primary importance of adequate protein intake and appropriate total caloric targets (regardless of carbohydrate‒fat proportion, which should be individualized).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Influence of macronutrient composition > Key findings for macronutrient composition
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Very-low energy diets (VLEDs) and low-energy diets (LEDs) have a high-risk/high-benefit profile, and their utility is limited primarily to urgent clinical interventions.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Summary and conclusions
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper may give no reason why it holds. It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Persistent plateaus generally reflect either adaptation toward a new energy equilibrium or reduced adherence.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Weight loss plateaus > Key findings for weight loss plateaus
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“In light of this issue, education, re-education, skill-building, and accountability are needed to alleviate the occurrence of progress plateaus, which are largely mediated by lapses in compliance.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Weight loss plateaus > Weight loss plateaus: theory
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: fails — It may be too vague to check against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. It may be too vague to check against evidence.
In the paper
“A systematic review and meta-analysis by Poon et al. [203] investigated the effect of intermittent dieting with break periods on body composition and metabolic adaptation. A total of 12 RCTs were included, ranging from 4 to 52 weeks, with diet breaks ranging 1 day to 6 weeks. Statistically significant improvements in body composition occurred in both the intermittent and continuous energy”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Adaptive thermogenesis
What the sources say
- Not checked — no full text of the sourcecites [203] Poon ET, Tsang JH, Sun F, et al. Effects of intermittent dieting with break periods on body composition and metabolic adaptation: a systematic review and meta-analysis. Nutr Rev. 2025; 83(1): 59– 71. doi: 10.1093/nutrit/nuad168 38193357 source
plain- Asserted: passes — The authors put it forward as true.
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- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“These adaptations occurred in both individuals with and without obesity and involved changes in resting and nonresting energy expenditure, supporting the concept that human energy balance is subject to physiological regulation that can oppose sustained departures from an individual’s customary body weight.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Adaptive thermogenesis
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Persistent stagnations in body weight evoke the “set-point” concept (also called the lipostatic theory), which posits that humans have a genetically predetermined body weight in adulthood, governed by hypothalamic control, which the body is inexorably driven toward maintaining, regardless of attempts at change [218].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Weight loss plateaus > Weight loss plateaus: theory
What the sources say
- Not checked yetcites [218] Harris RB. Role of set-point theory in regulation of body weight. FASEB J. 1990; 4(15): 3310– 3318. doi: 10.1096/fasebj.4.15.2253845 2253845
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Dietary carbohydrate-fat proportion can be individualized to personal preference for the goal of weight loss, since the range of ketogenic to low-fat diets performs similarly.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Position of the International Society of Sports Nutrition (ISSN)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“A multitude of tactics can be implemented to manage and overcome plateaus.”
- Also stated in: § Summary and conclusions · plain
“A multitude of tactics can be implemented to manage and overcome plateaus when further weight reduction is desired.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Position of the International Society of Sports Nutrition (ISSN)
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it. The paper may give no reason why it holds.
- Also stated in: § Summary and conclusions · plain
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Weight loss commonly slows over time, and periods of weight stability may reflect physiological adaptation, behavioral factors, or normal fluctuations.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Weight loss plateaus > Key findings for weight loss plateaus
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Martins et al. [193] investigated REE changes in overweight subjects after a mean loss of 12 kg over a ~6-month period. After reaching the targeted weight loss via an 800 kcal/day diet, AT was −54 kcal. At the 1- and 2-year follow-up points (where 52% and 54% of weight was regained), assessments were conducted after the 4-week weight-stability periods, and AT was −43 and −19 kcal, respectively. It”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Adaptive thermogenesis
What the sources say
- Not checked yetcites [193] Martins C, Gower BA, Hill JO, et al. Metabolic adaptation is not a major barrier to weight-loss maintenance. AJCN. 2020; 112(3): 558– 565. doi: 10.1093/ajcn/nqaa086 PMC7458773 32386226
plain- Asserted: passes — The authors put it forward as true.
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- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Pontzer and Trexler [181] reported that the compensation or ‘constraint’ of energy expenditure is reduced with resistance training but pronounced during combined aerobic exercise and dietary restriction.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Physical & physiological adaptations
What the sources say
- Not checked yetcites [181] Pontzer H, Trexler ET. The evidence for constrained total energy expenditure in humans and other animals. Curr Biol. 2026; 36(4): 1013– 1025 e4. doi: 10.1016/j.cub.2026.01.025 41653928
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Diets for body weight reduction can be broadly categorized by the magnitude of energy deficit, linearity of energy deficit, and macronutrient composition.”
- Also stated in: § Position of the International Society of Sports Nutrition (ISSN) · plain
“Diets for body weight reduction can be broadly categorized by the magnitude of the energy deficit, linearity of the deficit, and macronutrient composition.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Summary and conclusions
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim.
- Also stated in: § Position of the International Society of Sports Nutrition (ISSN) · plain
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“These aggressive diets may increase lean mass loss, although adequate protein intake and resistance training may mitigate this risk.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Position of the International Society of Sports Nutrition (ISSN)
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Ultimately, the weight loss-mediated increase in ghrelin and a decrease in PYY and GLP-1 sets the stage for increased hunger and decreased satiety, reflecting the body’s perpetual homeostatic drive.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Physical & physiological adaptations
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Body weight regulation reflects the interaction of biological constraints, individual variability, and lifestyle behaviors rather than a fixed “set point.””
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Weight loss plateaus > Key findings for weight loss plateaus
plaincorrelational- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper may give no reason why it holds.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Total daily protein is of primary importance; The specific distribution of the constituent doses is a secondary concern.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Position of the International Society of Sports Nutrition (ISSN)
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Skeletal muscle is a subcomponent of lean mass, accounting for ~50% of total lean mass, but contributing to only ~30% of REE [185].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Physical & physiological adaptations
What the sources say
- Not checked yetcites [185] Javed F, He Q, Davidson LE, et al. Brain and high metabolic rate organ mass: contributions to resting energy expenditure beyond fat-free mass. AJCN. 2010; 91(4): 907– 912. doi: 10.3945/ajcn.2009.28512 PMC2844678 20164308
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Adaptive thermogenesis represents a measurable but often modest reduction in energy expenditure after weight loss; current evidence suggests that it is substantially attenuated or absent in weight-stable conditions, challenging the concept of a persistent “starvation mode” that prevents long-term weight loss/weight loss maintenance.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Key findings for adaptations to weight loss
hedgeddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“In practice, apparent plateaus can also reflect short-term noise rather than a true stall in fat loss, for example, changes in total body water, glycogen, and gut content, menstrual cycle-related fluid shifts, inflammation after novel or high-volume training, travel, and sodium or carbohydrate intake.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Weight loss plateaus > Weight loss plateaus: theory
plainconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it. The paper may give no reason why it holds.
In the paper
“A classic investigation by Leibel et al. [199] demonstrated that experimentally induced changes in body weight elicit substantial, directionally compensatory adaptations in energy expenditure: maintenance of a body weight ≥10% below baseline was associated with a reduction in total energy expenditure of approximately 6–8 kcal/kg fat-free mass/day, whereas a 10% increase in body weight increased”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Adaptive thermogenesis
What the sources say
- Not checked — no full text of the sourcecites [199] Leibel RL, Rosenbaum M, Hirsch J. Changes in energy expenditure resulting from altered body weight. NEJM. 1995; 332(10): 621– 628. doi: 10.1056/NEJM199503093321001 7632212 source
boosteddirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Only 5 of the 66 subjects overcame the weight loss-mediated reduction in AEE, which required reducing sedentary time by 2 h per day, and increasing the duration of actively standing (50 min), walking (30 min), and bicycling (5 min).”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Physical & physiological adaptations
What the sources say
- Not checked yetcites [179] Bonomi AG, Soenen S, Goris AH, et al. Weight-loss induced changes in physical activity and activity energy expenditure in overweight and obese subjects before and after energy restriction. PLoS One. 2013; 8(3): e59641. doi: 10.1371/journal.pone.0059641 PMC3605325 23555733
plaindirectn = 66- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Successful weight loss often requires professional assistance and social support.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Summary and conclusions
plainconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: fails — The paper may give no reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it. The paper may give no reason why it holds.
In the paper
“However, at rest, its energy expenditure is relatively minor (~13 kcal/kg/day) compared to other organs, such as the liver, brain, heart, and kidneys, which are 15–30 times more metabolically active at rest than skeletal muscle is [186].”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Physical & physiological adaptations
What the sources say
- Not checked yetcites [186] McClave SA, Snider HL. Dissecting the energy needs of the body. Curr Opin Clin Nutr Metab Care. 2001; 4(2): 143– 147. doi: 10.1097/00075197-200103000-00011 11224660
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: unclear — It is unclear whether the paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“Horn et al. [212] recently defined a ‘weight plateau’ as less than 5% weight loss in a 12-week period.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Weight loss plateaus > Weight loss plateaus: theory
What the sources say
- Not checked yetcites [212] Horn DB, Kahan S, Batterham RL, et al. Time to weight plateau with tirzepatide treatment in the SURMOUNT-1 and SURMOUNT-4 clinical trials. Clin Obes. 2025; 15(3): e12734. doi: 10.1111/cob.12734 PMC12096058 39800653
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: fails — The paper’s conclusions may not depend on it.
- Based: passes — The paper gives a reason why it holds.
Probably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Weight loss promotes behavioral and appetite-related adaptations, including reduced non-exercise activity thermogenesis (NEAT), increased hunger signals, and decreased satiety signals; however, maintaining physical activity, resistance training, and reducing sedentary behaviors may help minimize compensatory responses.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Key findings for adaptations to weight loss
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
In the paper
“In a hypocaloric example, Martin et al. [208] examined the effects of calorie restriction on free-living activity energy expenditure (AEE), excluding exercise-related expenditure, allowing NEAT to be the focus. Across three separate trials, calorie restriction ranged from 10% to 30% below maintenance, with one trial also including a low-calorie diet (890 kcal/day until 15% weight loss, followed by”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Non-exercise activity thermogenesis (NEAT)
What the sources say
- Not checked yetcites [208] Martin CK, Das SK, Lindblad L, et al. Effect of calorie restriction on the free-living physical activity levels of nonobese humans: results of three randomized trials. J Appl Physiol (1985). 2011; 110(4): 956– 963. doi: 10.1152/japplphysiol.00846.2009 PMC3075130 21292847
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one. The quote only partly states this claim.
In the paper
“This study by Campbell et al. [204] administered a non-linear diet that involved a 35% deficit (via carbohydrate restriction) on 5 days, followed by 2 days at maintenance calories (via refeeding carbohydrate). The control group maintained a daily 25% caloric deficit. Carbohydrate intake in the two groups was equivalent when averaged across the week. No statistically significant between-group”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Adaptations to weight loss > Adaptive thermogenesis
What the sources say
- Not checked yetcites [204] Campbell BI, Aguilar D, Colenso-Semple LM, et al. Intermittent energy restriction attenuates the loss of fat free mass in resistance trained individuals. A randomized controlled trial. J Funct Morphol Kinesiol. 2020; 5(1): 19. doi: 10.3390/jfmk5010019 PMC7739314 33467235
plain- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one. The quote only partly states this claim.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“It can occur in response to hypocaloric conditions and weight loss, but it is not an inevitable response, and it may attenuate substantially upon attainment of weight stability.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Position of the International Society of Sports Nutrition (ISSN)
hedgedconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“In practical terms, persistent weight loss plateaus generally arise from two broad mechanisms: 1) arrival at a new energetic equilibrium, where strategic adjustments may be required to resume progress, or 2) decreased dietary and exercise adherence.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Weight loss plateaus > Weight loss plateaus: theory
plaindirect- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Daily protein intakes ranging from 1.6 to 2.2 g/kg BW combined with resistance training may optimize muscle anabolism”
- Also stated in: § Summary and conclusions · plain
“Protein intakes of 1.6–2.2 g/kg/day (and even higher in lean, resistance-trained individuals) can optimize lean mass retention in sustained hypocaloric conditions, and possibly result in recomposition.”
§ International Society of Sports Nutrition position stand: diets for body weight reduction > Position of the International Society of Sports Nutrition (ISSN)
plainconditional- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
The quote only partly states this claim.
- Also stated in: § Summary and conclusions · plain
The paper relies on this without support.
There is a need for a position stand to distinguish evidence-based information from falsehood in the media landscape regarding diets for weight loss.
“The diversity of dietary approaches to weight loss is accompanied by claims of varying veracity. This presents the challenge of distinguishing evidence-based information from falsehood pervading the media landscape.”
The paper relies on this without support.
Findings from overweight/obese clinical populations can be extrapolated to healthy, physically active, and/or athletic adults when the evidence base is primarily clinical.
“while drawing on overweight/obesity research when the evidence base is primarily clinical”
The paper relies on this without support.
For individuals on prescription medications for weight loss such as GLP-1 receptor agonists, the effect is an induction of low to very low energy intake, analogous to purposeful dieting.
“For individuals on prescription medications for weight loss, such as the GLP-1 RA class of medicines, the effect is an induction of low to very low energy intake, analogous to purposeful dieting.”
The paper relies on this without support.
The transient energy deficits imposed by fasting periods tend to outpace the transient energy surpluses imposed by unrestricted feeding periods.
“The transient energy deficits imposed by fasting periods (whether intra-day or intra-week) tend to outpace the transient energy surpluses imposed by unrestricted feeding periods.”
The paper relies on this without support.
High-quality weight loss is characterized by maximal preservation of lean mass.
“High-quality weight loss is characterized by maximal preservation of lean mass, which is a crucial differentiation from merely moving the number on the scale.”
The paper relies on this without support.
The ultimate goal of weight loss is the ability to sustain a healthier body weight over time, not continued weight reduction.
“the ultimate goal of weight loss is not continued weight reduction, but the ability to sustain a healthier body weight over time.”
The paper relies on this without support.
A 4- to 8-week period of stagnation in the face of good adherence can be considered a plateau.
“A 4- to 8-week period of stagnation in the face of good adherence can be considered a plateau.”
Citations
Cites
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The Role of Cheat Meals in Dieting: A Scoping Review of Physiological and Psychological Responses
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Comparison of two nutritional protocols in body re-composition of resistance-trained participants
Vargas-Molina, S., García-Palumbo, A., García-Sillero, M., Bonilla, D. A., Petro, J. L., Aragon, A. A., Schoenfeld, B. J., & Benítez-Porres, J. (2026) · European Journal of Applied Physiology · doi:10.1007/s00421-026-06209-6 · Cited by 1
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Cited by
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Metadata
- Authors
- Aragon, A. A., Campbell, B. I., Schoenfeld, B. J., Stout, J. R., Kalman, D., Arciero, P. J., Arent, S. M., Kreider, R. B., Taylor, L. W., Bannock, L., Wildman, R. E. C., Kerksick, C. M., & Antonio, J.
- Affiliations
- Fit Advancement, LLC
- University of South Florida (US)
- Department of Exercise Science and Recreation, CUNY Lehman College
- University of Central Florida (US)
- Nova Southeastern University (US)
- Skidmore College (US)
- University of South Carolina (US)
- Texas A&M University (US)
- University of Mary Hardin–Baylor (US)
- Institute of Performance Nutrition
- Kansas State University (US)
- Lindenwood University (US)
- Department of Health and Human Performance, Nova Southeastern University
- Corresponding author
- Aragon, Alan A.
- ORCID
- Venue
- Journal of the International Society of Sports Nutrition
- Publisher
- Informa UK Limited
- Published
- 2026-10-13
- Volume
- 23
- Issue
- 1
- Pages
- 2740266-2740266
- ISSN
- 1550-2783 (ISSN-L)
- PMC
- PMC13665703
- OpenAlex
- W7221692863
- Cited by
- 0
- References
- 219
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Journal of the International Society of Sports Nutrition (publishedVersion, cc-by)
- PubMed (publishedVersion)
- PubMed Central (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Topics
- Health Sciences › Medicine › Physiology (medical) › Dietary Effects on Health
- Health Sciences › Medicine › Physiology (medical) › Diet and metabolism studies
- Health Sciences › Nursing › Nutrition and Dietetics › Nutrition, Health and Food Behavior
- Keywords
- weight loss, weight loss diet, negative energy balance, very low calorie diet, hypocaloric diet, intermittent fasting, alternate-day fasting, time-restricted eating, meal frequency, protein intake, resistance training, macronutrient composition, body composition, athletic performance, overweight and obesity, nutritional adequacy
- MeSH terms
- Energy Intake, Diet, Reducing, Dietary Proteins, Humans, Obesity, Weight Loss, Caloric Restriction, Overweight, Sports Nutritional Sciences, Sports Nutritional Physiological Phenomena
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
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