Digested milk whey — especially goat whey — potently stimulated satiety hormones GLP-1 and CCK from gut cells in vitro, with digested forms far outperforming undigested whey.
Goat whey: best GLP-1 stimulatorDigested goat whey triggered the highest GLP-1 release at 86.33 pg/mL from gut hormone cells
What the researchers found
Digested whey samples were the most potent CCK and GLP-1 stimulators. Digested goat whey produced the highest GLP-1 release (86.33 pg/mL). Fermented mixture whey produced the highest CCK release (80.78 pg/mL). Undigested whey showed weak hormone stimulation.
Why it matters
Understanding which whey proteins produce the most satiety hormones could optimize dairy-based supplements for appetite control and weight management.
The numbers in context
Goat whey digested: GLP-1 86.33 pg/mL; mixed whey fermented: CCK 80.78 pg/mL; digested > fermented > non-digested
How the study worked
In vitro simulated gastrointestinal digestion (oral through colonic fermentation) of whey from cow, sheep, goat, and mixed milks. STC-1 enteroendocrine cell line incubated for 2 hours with non-digested, digested, and fermented samples. Measured CCK and GLP-1 secretion.
Who was studied
STC-1 enteroendocrine cells (gut hormone-producing cell line)
What this study cannot tell us
In vitro cell line study — STC-1 cells may not perfectly replicate human gut hormone responses. Simulated digestion may differ from in vivo digestion. No human satiety or weight loss outcomes measured.
How to read the evidence
Preliminary — in vitro cell line study with simulated digestion. No human satiety or appetite data.
When this study was published
Published in 2020; food-derived GLP-1 stimulation is an active area as GLP-1 drugs gain widespread attention.
The bigger picture
This study connects dairy science with the GLP-1/incretin system that underpins modern weight-loss drugs like semaglutide. Food-based approaches to stimulating the same pathways could complement pharmaceutical interventions.
Questions still open
- Would goat whey protein supplementation produce measurably greater satiety in humans compared to cow whey?
- Which specific peptides in digested goat whey are responsible for GLP-1 stimulation?
- Could whey-derived GLP-1 stimulation meaningfully complement GLP-1 drug therapy for weight loss?
Common questions
Why was digested whey better than undigested for satiety hormones?
Why might goat whey be better than cow whey for satiety?
Read the original research
Milk whey from different animal species stimulates the in vitro release of CCK and GLP-1 through a whole simulated intestinal digestion.
Food & function, 11(8), 7208-7216
Citation
Sánchez-Moya, T; Planes-Muñoz, D; Frontela-Saseta, C; Ros-Berruezo, G; López-Nicolás, R. (2020). Milk whey from different animal species stimulates the in vitro release of CCK and GLP-1 through a whole simulated intestinal digestion.. Food & function, 11(8), 7208-7216. https://doi.org/10.1039/d0fo00767f