Cited by 56Dietary Effects on HealthNutrition, Health and Food BehaviorRegulation of Appetite and Obesity

Beneficial effect of high energy intake at lunch rather than dinner on weight loss in healthy obese women in a weight-loss program: a randomized clinical trial

Open access
Madjd, Ameneh, Taylor, Moira A, Delavari, Alireza, Malekzadeh, Reza, Macdonald, Ian A, Farshchi, Hamid R·2016·The American Journal of Clinical Nutrition

Abstract

Background The association between the time of nutrient intake and health has been described in a few studies. To our knowledge, no study has evaluated the relation between high energy intakes at lunch compared with at dinner on weight loss in overweight and obese subjects.Objective We compared the effect of high energy intake at lunch with that at dinner on weight loss and cardiometabolic risk factors in women during a weight-loss program.Design Overweight and obese women [n = 80; body mass index (BMI; in kg/m 2): 27-35; age: 18-45 y] were asked to eat either a main meal at lunch (LM) or a main meal at dinner (DM) for 12 wk while in a weight-loss program.Results A total of 80 participants were randomly assigned to one of 2 intervention groups. Sixty-nine subjects (86%) completed the trial (34 subjects in the DM group, and 35 subjects in the LM group). Baseline variables were not significantly different between groups. A significant reduction in anthropometric measurements and significant improvements in cardiometabolic risk characteristics were observed over 12 wk in both groups. Compared with the DM group, the LM group had greater mean ± SD reductions in weight (LM: -5.85 ± 1.96 kg; DM: -4.35 ± 1.98 kg; P = 0.003), BMI (LM: 2.27± 0.76; DM: 1.68 ± 0.76; P = 0.003), homeostasis model assessment of insulin resistance (LM: -0.66 ± 0.33; DM: -0.46 ± 0.24; P = 0.001), and fasting insulin (LM: -2.01 ± 1.10 mIU/mL; DM: -1.16 ± 0.72 mIU/mL; P < 0.001) after 12 wk. However, there were no significant differences for fasting plasma glucose and lipid profiles within both groups after 12 wk.Conclusions The consumption of higher energy intake at lunch compared with at dinner may result in favorable changes in weight loss in overweight and obese women after a weight-loss program of 12 wk. The consumption may also offer clinical benefits to improve insulin resistance. This trial was registered at clinicaltrials.gov as NCT02399280.

Integrity signals

Registry

Crossref · 10.3945/ajcn.116.134163

Cites

42 of 42 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 25 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    In both the LM and DM groups, body weight decreased significantly after 12 weeks.

    “As shown in Table 2, there was a significant weight reduction in each group after 12 wk (P , 0.001).”
    • Also stated in: § Abstract · plain
      “A significant reduction in anthropometric measurements and significant improvements in cardiometabolic risk characteristics were observed over 12 wk in both groups.”
    Quote in the paperNot a substantial claim
  • Findingown data

    There were no significant differences between the LM and DM groups in lipid profiles after 12 weeks.

    “but there were no significant differences between groups after 12 wk (Table2).”
    Quote in the paperNot a substantial claim
  • Findingown data

    In both the LM and DM groups, waist circumference decreased after 12 weeks.

    “In both groups, WC had decreased after 12 wk of intervention (P , 0.001) with no significant difference in WC effects between the 2 groups after the intervention.(P = 0.118).”
    Quote in the paperNot a substantial claim
  • Findingown data

    After 12 weeks, the LM group had a greater reduction in HOMA-IR than the DM group.

    “homeostasis model assessment of insulin resistance (LM: 20.66 6 0.33; DM: 20.46 6 0.24; P = 0.001)”
    • Also stated in: § Glucose metabolism measurement · plain
      “a significant improvement in insulin resistance in the LM group compared with in the DM group after 12 wk (P , 0.001).”
    Quote in the paperSubstantial claim
  • Findingown data

    Estimated energy intake decreased significantly over time in both groups.

    “Estimated energy intake measurements showed a significant reduction over time in both groups (P-time effect , 0.001).”
    Quote in the paperNot a substantial claim
  • May combine two claims. 15
  • Classified as probably not a substantial claim. 21
  • The quote only partly states this claim. 1
  • May combine two claims.

    Findingown data

    In both groups, FPG, fasting insulin, 2hpp glucose, HbA1c, and HOMA-IR all fell over 12 weeks.

    “Fasting plasma glucose, fasting serum insulin, 2hpp glucose, glycated hemoglobin, and HOMA-IR all decreased over time in both groups (P , 0.001).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    In both groups, total cholesterol, LDL cholesterol, and triglycerides decreased and HDL cholesterol increased over 12 weeks.

    “Reductions in total-cholesterol, LDL-cholesterol, and triglyceride concentrations and an increase in HDL cholesterol were detected over 12 wk of the study in each group (P , 0.001), but there were no significant differences between groups after 12 wk (Table2).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingreasoning

    Both groups showed decreases in waist circumference and meaningful improvements in cardiometabolic risk factors.

    “In the current study, reductions in WC and significant improvements in cardiometabolic risk characteristics were observed in both groups as was expected because of the weight loss observed.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductown data

    Sixty-nine of the 80 randomized participants (86%) completed the 12-week trial, with 87% of the lunch group and 85% of the dinner group remaining.

    “Sixty-nine subjects (86%) completed the trial (34 subjects in the DM group, and 35 subjects in the LM group).”
    • Also stated in: § Baseline characteristics · plain
      “At total of 69 subjects completed the 12-wk intervention (86% of the randomly assigned population) (Figure 1).”
    • Also stated in: § Baseline characteristics · plain
      “At week 12, retention rates were 87% in the LM group and 85% in the DM group.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductown data

    All randomized participants who completed an initial assessment were included in an intention-to-treat analysis, and missing 12-week values were imputed by multiple imputation with linear regression.

    “All participants who were randomly assigned and completed an initial assessment were included in the final results in an intention-to-treat analysis.Multiple imputations with the use of linear regression were used to impute missing values from 12 wk and were based on the assumption that data were missing at random.”
    Quote in the paperSubstantial claim
    • The authors state this as an assumption: The 12-week data were missing at random.
  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductown data

    Eighty overweight or obese women were randomly assigned 1:1 to the LM or DM group using a computer-generated random-numbers method, with allocation concealed from subjects and dietitians until the initial intervention appointment.

    “Appropriate subjects were randomly assigned in a 1:1 ratio after baseline measures with the use of a computer-generated randomnumbers method by the project coordinator with allocation concealed from the subjects and dietitians until the random assignment was revealed to the study subjects at the initial intervention clinic appointment.”
    • Also stated in: § Abstract · plain
      “A total of 80 participants were randomly assigned to one of 2 intervention groups.”
    • Also stated in: § Baseline characteristics · plain
      “The remaining 80 subjects gave written consent, and 40 subjects were randomly allocated to each group.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Cross-sectional and longitudinal studies link skipping breakfast and eating late at night with obesity.

    “There is an association between breakfast skipping, late-night eating, and obesity as has been defined in cross-sectional (7,8) and longitudinal (9)(10)(11)(12)(13) studies.”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites [7] De La Hunty, 2007, Are people who regularly eat breakfast cereals slimmer than those who don’t? A systematic review of the evidence, British Nutrition Foundation-Nutrition Bulletin source

      Not checked in the free run.

    • cites [8] Szajewska, 2010, Systematic review demonstrating that breakfast consumption influences body weight outcomes in children and adolescents in Europe, Crit Rev Food Sci Nutr source

      Not checked in the free run.

    • cites (9)(10)(11)(12)(13)

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    A limitation of this trial was its short intervention duration.

    “In contrast, the limitation of the current study is the short-term intervention period.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Study design and conductreasoning

    The participants were middle-aged overweight or obese women who could follow a weight-loss plan and were motivated to stick to the protocol.

    “Second, subjects wished to lose weight, and the study included middleaged overweight and obese women who were able to comply with a weight-loss plan; thus, the women showed that they were motivated to adhere to the protocol of the weight-loss diet (44).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [44] Kraschnewski, 2010, Long-term weight loss maintenance in the United States, Int J Obes (Lond) source

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Premisecitation

    People who consume a larger share of their daily energy in the evening tend to eat significantly more over the whole day.

    “Conversely, when subjects eat a higher proportion of their total intake during the evening, they eat significantly more over the entire day (41).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [41] de Castro, 2004, The time of day of food intake influences overall intake in humans, J Nutr source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Morgan et al. (43) reported worse postprandial lipid tolerance for nighttime meals than for daytime meals.

    “A previous study by Morgan et al. (43) also showed an impaired postprandial lipid tolerance when meals were consumed at night compared with during the daytime.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [43] Morgan, 1999, Diurnal variations in peripheral insulin resistance and plasma non-esterified fatty acid concentrations: a possible link?, Ann Clin Biochem source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationown data

    Earlier trials enrolled people with metabolic syndrome or type 2 diabetes, while this trial enrolled healthy women who were overweight or obese.

    “In addition, the previous studies involved obese and overweight participants with metabolic syndrome and type 2 diabetes, whereas we recruited healthy obese and overweight women.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Interpretationreasoning

    The greater weight loss with a high-energy lunch versus dinner might be explained by better diet adherence in the lunch group.

    “In our study, the positive effect on weight loss of high energy intake at lunch compared with at dinner may reflect better adherence to the diet in the LM group.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Other authors did not confirm the finding that obese people eat less in the morning and more in the evening than lean controls.

    “However, these results were not confirmed by other authors (16).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [16] Andersson, 1996, Meal patterns in obese and normal weight men: the’Gustaf’study, Eur J Clin Nutr

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    The observed weight loss was expected given that the intervention involved energy restriction, activity monitoring, and frequent clinic visits and consultations.

    “This finding was not unexpected because our weight-loss program included energy restriction, activity monitoring, and frequent patient visits and consultations in the clinic.”
    Quote in the paperNot a substantial claim
  • The quote only partly states this claim.

    Interpretationown data

    Higher energy intake at lunch rather than at dinner may offer clinical benefits for improving insulin resistance.

    “The consumption may also offer clinical benefits to improve insulin resistance.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    A large breakfast and smaller dinner improved management of obesity and metabolic syndrome in a recent study.

    “In addition, a recent study on the effects of a high-energy breakfast with reduced intake at dinner showed beneficial results on the management of obesity and metabolic syndrome (24).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [24] Jakubowicz, 2013, High Caloric intake at breakfast vs. dinner differentially influences weight loss of overweight and obese women, Obesity (Silver Spring) source

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    In overweight and obese women following a weight-loss program short term, eating the main meal at lunch seems to improve weight loss and insulin sensitivity.

    “In conclusion, the consumption of the main meal at lunch appears to provide beneficial effects on weight loss and insulin sensitivity in overweight and obese women who are adhering to a weight-loss program over the shorter term.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    Late eating is linked to lower resting energy expenditure, lower fasting carbohydrate oxidation, and lower glucose tolerance.

    “A clinical study showed that eating late in the day was associated with reductions in resting energy expenditure, fasting carbohydrate oxidation, and glucose tolerance (22).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [22] Bandin, 2015, Meal timing affects glucose tolerance, substrate oxidation and circadian-related variables: A randomized, crossover trial, Int J Obes source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationcitation

    The insulin-response result agreed with an earlier short-term trial (42) in healthy volunteers.

    “This outcome was consistent with a previous short-term study (42) that was conducted in healthy volunteers with a different design and evaluated the short-term effects of high energy intake at breakfast compared with at dinner in combination with the effect of the glycemic index.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [42] Morgan, 2012, Effect of meal timing and glycaemic index on glucose control and insulin secretion in healthy volunteers, Br J Nutr source

      Not checked in the free run.

  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductown data

    A key strength was that this was a randomized outpatient clinical trial with participants on a comprehensive weight-control diet.

    “The principal strengths of this study are, first, that it was a randomized, outpatient, clinical trial, in which subjects were following a comprehensive diet plan for weight control.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Energy and nutrient intake has gradually moved later in the day.

    “Nevertheless, there has been evidence that the timing of energy and nutrient intake has shifted slightly over time with a greater proportion of intake later in the day (20).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [20] Almoosawi, 2012, Daily profiles of energy and nutrient intakes: are eating profiles changing over time, Eur J Clin Nutr source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductreasoning

    Offering a free diet plan and daily dietitian calls promoted regular biweekly dietitian visits, which helped encourage compliance in both groups.

    “Third, the provision of a free diet plan and a daily telephone call from a dietitian to each subject was an encouragement for regular biweekly visits with the dietitian when compliance could be encouraged in both groups.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    A greater share of daily energy at midday is linked to lower overweight/obesity risk, whereas a greater share in the evening is linked to higher risk.

    “Data from a recent observational study (21) also indicated that eating more of daily total energy intake at midday was associated with lower risk of being overweight or obese, whereas consuming more in the evening was associated with higher risk.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [21] Wang, 2014, Timing of energy intake during the day is associated with the risk of obesity in adults, J Hum Nutr Diet source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Prior intensive clinic-based behavioral lifestyle-modification programs have reported 5-10% weight losses at 6 months.

    “In intensive, clinic-based behavioral lifestyle-modification programs, weight losses of 5-10% have been detected at 6 mo (37-39)”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites [37] Wing, 2010, Long term effects of a lifestyle intervention on weight and cardiovascular risk factors in individuals with type 2 diabetes: four year results of the Look AHEAD trial, Arch Intern Med

      Not checked in the free run.

    • cites [38] Appel, 2003, Effects of comprehensive lifestyle modification on blood pressure control: main results of the PREMIER clinical trial, JAMA

      Not checked in the free run.

    • cites [39] Knowler, 2002, Reduction in the incidence of type 2 diabetes with lifestyle intervention or metformin, N Engl J Med source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationreasoning

    The weight-loss diet used here was low in fat, unlike the design of Morgan et al. (43), which had no weight-loss plan.

    “Note that our recommended diet for weight loss contained a low percentage of fat, whereas the study by Morgan et al. (43) had a different design in terms of not including any weight-loss plan.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [43] Morgan, 1999, Diurnal variations in peripheral insulin resistance and plasma non-esterified fatty acid concentrations: a possible link?, Ann Clin Biochem source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Compared with lean controls, obese individuals tend to consume less in the morning and more in the evening.

    “Previous studies have indicated that obese people tend to eat less in the morning and more in the evening than do lean controls (10,11,14,15).”
    Quote in the paperNot a substantial claim0 of 4 sources checked
    • cites [10] Berkey, 2003, Longitudinal study of skipping breakfast and weight change in adolescents, Int J Obes Relat Metab Disord source

      Not checked in the free run.

    • cites [11] Bellisle, 1988, Obesity and food intake in children: Evidence for a role of metabolic and/or behavioral daily rhythms, Appetite source

      Not checked in the free run.

    • cites [14] Fricker, 1990, Circadian rhythm of energy intake and corpulence status in adults, Int J Obes

      Not checked in the free run.

    • cites [15] Bertéus Forslund, 2002, Meal patterns and obesity in Swedish women-a simple instrument describing usual meal types, frequency and temporal distribution, Eur J Clin Nutr source

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Premisecitation

    Eating lunch late may harm the success of weight-loss treatment.

    “Additional evidence indicated that late-lunch eating may have deleterious effects on the success of weight-loss therapy (23).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [23] Garaulet, 2013, Timing of food intake predicts weight loss effectiveness, Int J Obes (Lond) source

      Not checked in the free run.

28 of 28
  • The authors state this as an assumption.

    The 12-week data were missing at random.

    “Multiple imputations with the use of linear regression were used to impute missing values from 12 wk and were based on the assumption that data were missing at random.”
  • The authors state this as an assumption.

    At baseline, all variables were normally distributed.

    “At baseline, the distribution was normal for all variables.”
  • The paper relies on this without support.

    Before this trial, the lunch-versus-dinner energy comparison had not been tested for weight loss in overweight or obese people.

    “To our knowledge, no study has evaluated the relation between high energy intakes at lunch compared with at dinner on weight loss in overweight and obese subjects.”
    “To our knowledge, there are few studies that have evaluated whether higher energy intake at lunch than at dinner results in greater weight loss in overweight and obese subjects when they are consuming an energy-restricted diet.In addition, this comparison has not been made with respect to lipid and glucose metabolism in this group.”
  • The paper relies on this without support.

    No earlier randomized trial had tested whether main-meal timing affects weight loss.

    “To our knowledge, this is the first randomized controlled trial of the effect on weight loss of the timing of the main meal.”
4 of 4

Claims other papers make about this one

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Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Abstract reverses the within-group glucose finding

    Minor

    The abstract says fasting plasma glucose did not change significantly within the groups, but the results report a significant decrease in both groups.

  • Stated LDL formula conflicts with the tabulated LDL values

    Minor

    The stated formula adds the triglyceride term. Using the DM baseline values in Table 1, it gives approximately 4.08 mmol/L, not the reported 2.64 mmol/L; subtracting that term gives approximately 2.64 mmol/L.

  • Abstract reverses the within-group lipid findings

    Minor

    The abstract reports no significant within-group lipid differences, whereas the results report significant lipid changes in each group.

3 of 3

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Authors
Madjd, A., Taylor, M. A., Delavari, A., Malekzadeh, R., Macdonald, I. A., & Farshchi, H. R.
Affiliations
  • University of Nottingham (GB)
  • Digestive Disease Research Institute (IR)
Corresponding author
Farshchi, Hamid R
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2016-10
Volume
104
Issue
4
Pages
982-989
ISSN
0002-9165 (ISSN-L)
OpenAlex
W2514370557
Cited by
56
References
43
Citations by year
2025: 2 · 2024: 4 · 2023: 10 · 2022: 11 · 2021: 7 · 2020: 10 · 2019: 3 · 2018: 3 · 2017: 5 · 2016: 1
FWCI
3.22
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion)
  • PubMed (publishedVersion)
  • Repository@Nottingham (University of Nottingham) (acceptedVersion, other-oa)
  • Repository@Nottingham (University of Nottingham) (submittedVersion, cc-by)
  • Nottingham ePrints (University of Nottingham) (submittedVersion, cc-by)
Funders
  • School of Life Sciences
  • University of Nottingham
  • Digestive Disease Research Institute
  • Tehran University of Medical Sciences
Topics
  • Health Sciences › Medicine › Physiology › Dietary Effects on Health
  • Health Sciences › Nursing › Nutrition and Dietetics › Nutrition, Health and Food Behavior
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
meal timing, weight loss, obesity, overweight women, insulin resistance, cardiometabolic risk factors, fasting insulin, body mass index, fasting blood glucose, lipid profile
MeSH terms
Adult, Blood Glucose, Energy Intake, Diet, Reducing, Feeding Behavior, Female, Humans, Insulin, Insulin Resistance, Lipids, Obesity, Weight Loss, Body Mass Index, Weight Reduction Programs, Meals, Lunch

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