New evidence
Collagen supplements raised a gut satiety hormone by roughly 40% in a small trial — but half a dozen other appetite markers didn’t budge.
This is among the first controlled tests of collagen on GLP-1, a hormone that signals fullness, but with only one short study in physically active women, it’s too early to say whether the effect is real or repeatable in a broader population.
In a 7‑day double‑blind trial, 15 grams of collagen peptides after exercise boosted total GLP‑1 — a hormone that slows digestion and tells your brain you’ve had enough to eat — by about 40% compared to placebo. Women also ate roughly 10% fewer calories at the next meal. But the same study saw no change in other appetite signals like ghrelin, blood sugar, or subjective hunger, so it’s unclear which mechanism drove the calorie reduction — if any.
Where this fits in the evidence
This is among the first studies we've indexed on Collagen Protein for Increased Intestinal GLP-1 Levels — treat it as an early signal until more research accumulates.
The study
- Randomized Controlled Trial (RCT)
- 2025-07-21
- The British journal of nutrition
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.