Research
Hormonal
Different protein sources (e.g., casein vs. whey) have distinct effects on gastric emptying rates and satiety due to their physico-chemical properties and digestion kinetics.
If you want to feel full longer, choose slower-digesting proteins like casein (found in cottage cheese or casein supplements). Faster-digesting proteins like whey will leave your stomach quicker. This difference is due to how they physically behave in the stomach and how they trigger satiety hormones.
GoodSupportsHIGH confidence
The emptying rate of the stomach after casein meal is slower as compared with that following soy meal, and it is also longer after the ingestion of casein preload compared with whey preload (48 g protein).
Why this rating
Supported by multiple studies comparing different protein sources in humans and animals.
Source
Dietary Proteins as Determinants of Metabolic and Physiologic Functions of the Gastrointestinal Tract
Alireza Jahan-Mihan et al. · Nutrients · 2011
DOI 10.3390/nu3050574
narrative_reviewCited 227×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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