Cited by 94Diabetes Treatment and ManagementPharmacology and Obesity TreatmentRegulation of Appetite and Obesity

Effect of the glucagon‐like peptide‐1 receptor agonist liraglutide, compared to caloric restriction, on appetite, dietary intake, body fat distribution and cardiometabolic biomarkers: A randomized trial in adults with obesity and prediabetes

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Silver, Heidi J., Olson, Dianna, Mayfield, Dustin, Wright, Patricia, Nian, Hui, Mashayekhi, Mona, Koethe, John R., Niswender, Kevin D. +2 more·2023·Diabetes, Obesity and Metabolism

Abstract

Aims: To investigate the hypothesis that weight loss with the glucagon‐like peptide‐1 receptor agonist (GLP‐1RA) liraglutide alone would lead to a greater reduction in the proportion of fat to lean tissue mass when compared to caloric restriction (CR) alone, as well as when compared to treatment with sitagliptin, a dipeptidyl peptidase‐4 (DPP‐4) inhibitor, that also enhances GLP‐1 activity ‐ to determine the independent effects of each treatment. Methods: A total of 88 adults with obesity and prediabetes were randomized to 14 weeks of intervention with CR (−390 kcal/d), liraglutide (1.8 mg/d), or the dipeptidyl peptidase‐4 inhibitor sitagliptin (100 mg/d) as a weight‐neutral comparator. Changes between groups in appetite and hunger ratings measured via visual analogue scales, dietary intakes, body weight, body composition via dual energy x‐ray absorptiometry, and resting energy expenditure via indirect calorimetry were assessed using the Kruskal‐Wallis test or Pearson's chi‐squared test. Results: Weight loss ≥5% of baseline body weight occurred in 44% of participants in the CR group, 22% of the liraglutide group and 5% of the sitagliptin group ( p = 0.02). The ratio of fat to lean mass decreased by 6.5% in the CR group, 2.2% in the liraglutide group, and 0% in the sitagliptin group ( p = 0.02). Visceral fat reduced by 9.5% in the CR group, 4.8% in the liraglutide group, and 0% in the sitagliptin group ( p = 0.04). A spontaneous reduction in dietary simple carbohydrates in the CR group was associated with improved homeostatic model assessment of insulin resistance score (HOMA‐IR). Conclusions: Although both liraglutide and CR are valuable strategies for cardiometabolic risk reduction, CR was associated with greater weight loss and more favourable improvements in body composition than treatment with liraglutide alone. Differences in the response to each of these interventions enables patients to be stratified to the most optimal intervention for their personal risk factors.

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  • In one observational study, a larger reduction in added sugars and a greater increase in dietary protein were seen among participants receiving GLP-1s plus dietary counseling compared to GLP-1s alone.

    “For instance, in one observational study, a larger reduction in added sugars and a greater increase in dietary protein were seen among participants receiving GLP‐1s plus dietary counseling compared to GLP‐1s alone [156].”

    From Nutritional priorities to support <scp>GLP</scp> ‐1 therapy for obesity: A joint Advisory from the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association, and The Obesity Society (2025) · cites this paper as [156]

    The Results (Effects of treatment on dietary intakes; page unavailable) report larger reductions in added sugars and a greater increase in protein’s share of calories with caloric restriction than with liraglutide. But Methods (Study design and Drug treatment; pages unavailable) describe a randomized trial with separate caloric-restriction and liraglutide groups, not an observational comparison of GLP-1 treatment plus dietary counseling against GLP-1 treatment alone. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Studies have demonstrated that reduced caloric intake accounts for much of the weight-reducing effect of incretin-mimetic drugs when used for the treatment of obesity.

    “studies have demonstrated that reduced caloric intake accounts for much of their weight‐reducing effect when used for the treatment of obesity.”

    From Strategies for minimizing muscle loss during use of incretin‐mimetic drugs for treatment of obesity (2025) · cites this paper as [58]

    The Introduction proposes that liraglutide-related weight loss may involve reduced appetite and energy intake. The Results report weight loss with liraglutide and reduced energy intake across all groups, but found no significant between-group difference in energy-intake reduction. The trial does not establish that reduced caloric intake accounts for much of liraglutide’s weight-loss effect, let alone that of incretin-mimetic drugs generally (page numbers unavailable in our copy). (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • Increasing protein intake is especially important for GLP-1-based treatments as there may be a shift in food preferences towards lower intake of high-nutritional quality protein compared with a standard calorie-restricted diet.

    “Increasing protein intake is especially important for GLP-1-based treatments as there may be a shift in food preferences towards lower intake of high-nutritional quality protein compared with a standard calorie-restricted diet.75”

    From Changes in lean body mass with <scp>glucagon‐like peptide</scp> ‐1‐based therapies and mitigation strategies (2024) · cites this paper as [75]

    The Results (Effects of treatment on dietary intakes; page unavailable) report that protein’s share of calories increased more with calorie restriction than with liraglutide. The Discussion notes greater preservation of lean mass in the calorie-restriction group, providing some rationale for attention to protein intake. But it reports no significant between-group difference in food preferences and does not establish a shift away from high-nutritional-quality protein. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Some evidence indicates an attenuation of the increase in protein intake, relative to total energy intake, with GLP-1RA therapies as compared to standard caloric restriction.

    “some evidence indicates an attenuation of the increase in protein intake, relative to total energy intake, with GLP-1RA therapies as compared to standard caloric restriction [31].”
  • In a parallel-arm randomized controlled trial, in the group receiving 14 weeks of caloric restriction (CR) combined with dietary counseling, the percentage of calories from dietary protein increased significantly compared with liraglutide monotherapy, whereas changes in total energy intake were similar between groups.

    “For instance, in a parallel-arm randomized controlled trial, 24-h dietary recall was used, and in the group receiving 14 weeks of CR combined with dietary counseling, the percentage of calories from dietary protein increased significantly compared with liraglutide monotherapy, whereas changes in total energy intake were similar between groups [110].”

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Authors
Silver, H. J., Olson, D., Mayfield, D., Wright, P., Nian, H., Mashayekhi, M., Koethe, J. R., Niswender, K. D., Luther, J. M., & Brown, N. J.
Affiliations
  • VA Tennessee Valley Healthcare System (US)
  • Vanderbilt University Medical Center (US)
  • Yale University (US)
Corresponding author
Silver, Heidi J.
Venue
Diabetes, Obesity and Metabolism
Publisher
Wiley
Published
2023-05-15
Volume
25
Issue
8
Pages
2340-2350
ISSN
  • 1462-8902 (ISSN-L)
  • 1463-1326
OpenAlex
W4376642783
Cited by
94
References
55
Citations by year
2026: 32 · 2025: 36 · 2024: 25 · 2023: 1
FWCI
19.28
Type
journal article
Language
en
Open access
Locations
  • Diabetes Obesity and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • American Heart Association (17SFRN33520017)
  • National Center for Advancing Translational Sciences (CTSA award #UL1TR002243)
  • Novo Nordisk Foundation Center for Basic Metabolic Research
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Medicine › Pharmacology › Pharmacology and Obesity Treatment
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
liraglutide, caloric restriction, sitagliptin, GLP-1 receptor agonists, DPP-4 inhibitors, obesity, prediabetes, weight loss, body composition, visceral fat, appetite, dietary intake, insulin resistance, cardiometabolic risk, resting energy expenditure, HOMA-IR, cardiometabolic biomarkers, treatment stratification
MeSH terms
Glucagon-Like Peptide-1 Receptor, Sitagliptin Phosphate, Liraglutide, Glucagon-Like Peptide-1 Receptor Agonists, Adult, Appetite, Body Weight, Cardiovascular Diseases, Diabetes Mellitus, Type 2, Dipeptidyl-Peptidases and Tripeptidyl-Peptidases, Eating, Humans, Hypoglycemic Agents, Obesity, Prediabetic State, Weight Loss, Caloric Restriction, Body Fat Distribution, Dipeptidyl-Peptidase IV Inhibitors

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