Hormonal
Whey protein induces greater satiety and reduces subsequent food intake compared to casein due to faster gastric emptying, leading to higher postprandial plasma amino acid, CCK, and GLP-1 concentrations.
If you want to feel fuller and eat less at your next meal, choose whey protein over casein. Whey digests faster, causing a quicker spike in satiety hormones (CCK and GLP-1) and blood amino acids. This 'fast' protein effect can help you naturally reduce your calorie intake at subsequent meals compared to 'slow' proteins like casein.
These results implicate post-absorptive increases in plasma amino acids together with both CCK and GLP-1 as potential mediators of the increased satiety response to whey...
Why this rating
Randomized, single-blind, within-subject design with objective biochemical measures and ad libitum food intake, though limited to healthy, lean volunteers.
Source
Casein and whey exert different effects on plasma amino acid profiles, gastrointestinal hormone secretion and appetite
Wendy L. Hall et al. · British Journal Of Nutrition · 2003
DOI 10.1079/bjn2002760
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