glp 1 agonist weight loss mechanism Beyond GLP-1: Retatrutide's triple-agonist (GLP-1, GIP, glucagon) is redefining metabolic health. Phase 2 data shows ~24% loss—surpassing semaglutide & tirzepatide. Evidence-based protocols demand nutrition support alongside prescribing GLP-1 mechanism of action. Glucagon-like
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