retatrutide triple agonist gip glp-1 glucagon phase 3 2025 glp 1 lr3 Beyond GLP-1: Retatrutide's triple-agonist mechanism (GLP-1, GIP, glucagon) is redefining metabolic health. 2 data shows ~24% weight loss—surpassing semaglutide & tirzepatide. Evidence-based protocols demand nutrition support alongside retatrutide mechanism triple agonist glp-1
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