Hormonal
Dietary proteins regulate gastrointestinal physiology and metabolic functions (including food intake, gastric emptying, and hormone release) through source-specific interactions with the GI tract, distinct from their role as amino acid sources.
When choosing protein sources, recognize that they do more than just build muscle. Different proteins (like casein vs. whey) digest at different rates and trigger different satiety hormones. This means the source of your protein affects your hunger and metabolic response, not just your amino acid intake.
The interaction of dietary proteins and their products of digestion with the regulatory functions of the gastrointestinal (GI) tract plays a dominant role in determining the physiological properties of proteins.
Why this rating
This is a comprehensive review paper citing numerous primary studies across multiple protein sources and mechanisms.
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
More from this paper
- Bioactive peptides (BAPs) derived from dietary proteins can survive digestion, interact with GI receptors, and exert physiological effects such as lowering blood pressure or regulating appetite, even if systemic absorption is limited.Good
- 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.Good
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