GLP-1 Weight Loss Peptides — Compare Vendors & Prices (2026)

GLP-1 receptor agonists are the fastest-growing category in research peptides. Originally developed for type 2 diabetes, compounds like Semaglutide, Tirzepatide, and Retatrutide have shown significant effects on body weight in clinical trials. Peptide Compare tracks live pricing and blind-test trust scores across dozens of vendors so you can find the best source.