GLP-1 Peptides Explained: Semaglutide vs. Tirzepatide vs. Retatrutide (Research Guide)

Three peptides are reshaping how medicine thinks about obesity, metabolic disease, and body composition. Semaglutide opened the door. Tirzepatide blew it off the hinges. Retatrutide is building an entirely different house. Here is what the clinical trials actually showed — and where research peptides fit in.

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