Vintage-style engraving of a person's midsection and hips in loose-fitting shorts, rendered in fine pine-green crosshatch linework on cream, paired with a solid brass accent panel on a deep pine-green background.

Vendor Reviews

GLP-1 drugs are peptide medications that copy a hormone your gut already makes to manage appetite and blood sugar. ⚠ NEEDS MEDICAL REVIEW Two of them are FDA-approved for weight loss in the United States: semaglutide and tirzepatide. A third one you’ve probably heard about — retatrutide — is not approved and is still working its way through trials.

That’s the whole map. If the word “peptide” is doing a lot of unexplained work here, start with what a peptide actually is, then come back — the rest of this page assumes you know these are short chains of amino acids, not a supplement category.

Regulatory status: Semaglutide (Wegovy) and tirzepatide (Zepbound) are FDA-approved for chronic weight management; retatrutide is investigational and not FDA-approved, as of September 2026. This changes — we check it quarterly.

Author

  • Photo of Jake Cutler, head of editorial strategy for The Peptide Authority

    Jake Cutler is a writer, teacher, and veteran editorial strategist. Previous to co-founding The Peptide Authority, Jake ran online publications in a number of highly regulated industries (residential solar, financial advising, and kids tech).