FDA-Approved Peptides: The Complete List

Two facts sit awkwardly together. Peptide drugs are a large and growing part of the approved pharmacopoeia — well over forty distinct peptide active ingredients have FDA approval. And almost none of the peptides sold online as research compounds are among them.

Both statements are true because they describe different lists. This guide sets out the approved list, then explains exactly where the line falls.

Metabolic and weight-management peptides

This is the cluster most people are actually asking about. Both semaglutide and tirzepatide are approved peptide drugs with full labels, trial programmes and pharmacovigilance behind them.

Growth hormone axis

Sermorelin is the common source of confusion. It genuinely held FDA approval and was then withdrawn from the US market — for commercial reasons rather than a safety finding. “Formerly approved” is not the same as “approved”, and it is often presented as the latter. The sermorelin dosage guide covers the detail.

Bone, hormone and endocrine peptides

Melanocortin and neurological peptides

The peptides that are not approved

The compounds that dominate the research-peptide market have no FDA approval of any kind — no indication, no label, no approved manufacturer:

The last row is a meaningfully different category from the others. Retatrutide has published phase 2 results in the New England Journal of Medicine and an ongoing phase 3 programme. It is unapproved because it is unfinished, not because nobody looked.

The compounding pharmacy question

A second regulatory list matters as much as the approval list. Compounding pharmacies may prepare certain drugs from bulk substances, and FDA maintains categories for substances nominated for that use.

In 2023 FDA placed a group of widely sold peptides into Category 2 — substances that raise significant safety risks. The category included BPC-157, ipamorelin, CJC-1295, epitalon, kisspeptin-10, MOTS-c and thymosin beta-4, among others. The practical consequence is that compounding pharmacies cannot legally prepare them.

Reading approval claims

1. “FDA approved” applies to a drug product, not a molecule. Approval covers a specific manufacturer, formulation, dose and indication.

2. “FDA registered facility” is not approval. Facility registration is an administrative listing that any facility can obtain.

3. “GRAS” is a food-additive standard and has nothing to do with injectable use.

4. “Formerly approved” is a real category and is the honest description of sermorelin.

5. An approved molecule sold outside the approved product is not covered by that approval — this is the semaglutide, tirzepatide and PT-141 situation.

The peptide legality guide covers what that means for buyers, and the vendor selection guide covers how to evaluate claims like these.