Peps
A peptide can be a prescription drug or an unapproved chemical
A peptide is a short chain of amino acids. Insulin, semaglutide (Ozempic, Wegovy), tirzepatide (Mounjaro, Zepbound), teriparatide and oxytocin are all peptides, and all are FDA-approved prescription medicines. Collagen peptides sold as food supplements are a separate, food category.
Many peptides discussed online, such as BPC-157, TB-500, ipamorelin and CJC-1295, have never been approved by the FDA for any use. Of the 117 compounds PepsRadar profiles, 35 are in an FDA-approved medicine and 77 are not.
Source: accessdata.fda.gov ↗
What “research use only” means to the FDA
Online sellers usually label these products “for research use only” or “not for human consumption.” The FDA has not treated that label as a shield: in August 2026 it sent warning letters to several research-peptide sellers stating that products such as tesamorelin, retatrutide and PT-141 were unapproved new drugs, despite their research-use labels.
Whether buying or owning a particular product is legal where you live depends on federal, state and national law, which PepsRadar does not interpret. This guide describes what regulators have said; it is not legal advice.
Source: fda.gov ↗
Source: fda.gov ↗
Source: fda.gov ↗
Pharmacy compounding is a separate path
Pharmacies may only compound drugs from bulk substances on the FDA’s lists. In July 2026 an FDA advisory committee voted to recommend six peptides, including BPC-157, for the list that would let pharmacies compound them, after FDA staff reviews raised safety concerns. The vote is advice, not a decision.
In October 2026 the FDA and HHS sent an interim access policy for compounding certain peptides to the White House for review. Until a final policy is published, those peptides remain unapproved drugs, and vials sold as research chemicals fall outside any compounding policy.
Source: fda.gov ↗
Source: reginfo.gov ↗
Are peptides steroids?
No. Steroids such as testosterone are built on a four-ring carbon skeleton made from cholesterol. Peptides are chains of amino acids, the same building blocks as proteins, and the body makes, absorbs and breaks them down differently.
The confusion comes from how some are used. Growth-hormone secretagogues such as ipamorelin and CJC-1295 act on the body’s hormone systems and are banned in sport alongside anabolic steroids. MK-677, often grouped with them, is not a peptide at all but a small-molecule drug.
Source: wada-ama.org ↗
Banned in sport
The 2026 World Anti-Doping Agency list names 27 of the compounds PepsRadar profiles, and 47 more appear to fall under one of its class rules, most under section S0, which bans at all times any substance with no government approval for human use. Our page on which peptides are banned in sport lists each one.
Source: wada-ama.org ↗
Continue with the original research
Study examples are based on selected publication abstracts and the explicitly described source documents. This is not a systematic review or an individualized treatment guide. Editorial scope and methods.