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Blood 118 , 855864 (2011)

Certain amino acids and bioactive peptides from protein digestion stimulate the release of hormones like glucagon-like peptide-1 (GLP-1) and cholecystokinin (CCK), which help support nutrient absorption, energy balance, and hormonal communication between organs

The short dihexa half life actually allows for precise control over receptor activation windows without accumulation toxicity, which is why research protocols typically use daily or every-other-day dosing rather than sustained-release formulations

Investigation of cortical glutamateglutamine and -aminobutyric acid in obsessivecompulsive disorder by proton magnetic resonance spectroscopy