A high protein diet achieved 100% prediabetes remission (vs 33% for high carb) by boosting the incretin peptides GLP-1 and GIP while suppressing the hunger hormone ghrelin.
100% vs 33% prediabetes remissionHigh protein diet achieved complete prediabetes reversal in all participants, partly through naturally boosting the same incretin peptides (GLP-1, GIP) that blockbuster diabetes drugs target pharmacologically.
What the researchers found
High protein diet achieved 100% prediabetes remission vs 33% on high carb diet, with significantly greater increases in GLP-1 and GIP AUC, greater ghrelin suppression, and improved BNP over 6 months.
Why it matters
Prediabetes affects hundreds of millions of people globally. Achieving 100% remission with diet alone, through a mechanism involving satiety and incretin hormones, could prevent millions of diabetes cases.
The numbers in context
24 participants; 100% vs 33% prediabetes remission; GLP-1 AUC p=0.001; GIP AUC p=0.005; ghrelin AUC p=0.001-0.005; BNP p=0.001; similar weight loss between groups
How the study worked
Randomized controlled trial. 24 obese adults with prediabetes. High protein (n=12) vs high carbohydrate (n=12) diet for 6 months with all food provided. OGTT and MTT measured GLP-1, GIP, ghrelin, BNP, insulin, glucose at baseline and 6 months.
Who was studied
24 obese adults with prediabetes randomized to high protein or high carbohydrate diet for 6 months with all food provided
What this study cannot tell us
Very small study (24 participants). All food was provided, which is not practical long-term. Six months may not predict lasting remission. No long-term follow-up. The HP and HC diets differed in multiple ways, not just protein content.
How to read the evidence
This is a small randomized controlled trial (n=24) with a registered protocol and all food provided, ensuring dietary compliance. The randomized design supports causal conclusions, but the very small sample size limits generalizability. The 100% remission rate may not replicate in larger, more diverse populations.
When this study was published
Published in 2021, this study provides evidence connecting dietary composition to incretin peptide release at a time when GLP-1 RA drugs were rapidly expanding.
The bigger picture
This study provides a fascinating dietary parallel to the GLP-1 drug revolution. While drugs like semaglutide and tirzepatide achieve their effects by mimicking GLP-1 and GIP pharmacologically, this study shows that dietary composition can naturally boost these same peptides. The finding that protein preferentially stimulates incretins and suppresses ghrelin suggests that diet optimization could complement or potentially reduce the need for expensive peptide drug therapy in some patients.
Questions still open
- Could combining a high-protein diet with low-dose GLP-1 agonists produce synergistic metabolic benefits?
- Do the incretin hormone improvements from high-protein diets persist long-term after participants return to self-selected diets?
- Which specific proteins or amino acids are most responsible for stimulating GLP-1 and GIP release?
Common questions
How does eating more protein boost GLP-1 and GIP?
If diet can boost GLP-1 naturally, why do people need GLP-1 drugs?
Read the original research
High protein diet leads to prediabetes remission and positive changes in incretins and cardiovascular risk factors.
Nutrition, metabolism, and cardiovascular diseases : NMCD, 31(4), 1227-1237
Citation
Stentz, Frankie B; Mikhael, Andrew; Kineish, Omer; Christman, John; Sands, Chris. (2021). High protein diet leads to prediabetes remission and positive changes in incretins and cardiovascular risk factors.. Nutrition, metabolism, and cardiovascular diseases : NMCD, 31(4), 1227-1237. https://doi.org/10.1016/j.numecd.2020.11.027