Peptide therapy: what is approved, what is not, and what the evidence shows

What a peptide is, and why the label is misleading

A peptide is simply a short chain of amino acids. Many act as signaling molecules in the body. Insulin is a peptide, and so are the GLP-1 medications semaglutide and tirzepatide. So are dozens of experimental compounds sold online with labels such as research use only.

Because the category is so broad, calling something a peptide says nothing about whether it has been tested in people, whether it is approved or whether what is in the vial matches the label. Each substance has to be judged on its own record.

Where the popular wellness peptides stand with the FDA

None of the following is an FDA-approved drug: BPC-157, TB-500, KPV, MOTS-c, epithalon (also spelled epitalon) and DSIP, which the FDA calls emideltide. The FDA had previously listed these substances in a category for bulk ingredients that may present significant safety risks, citing concerns such as immune reactions, peptide impurities and little or no human safety data. As of April 2026, the FDA lists them as nominations that were withdrawn by the people who nominated them.

On July 23 and 24, 2026, the FDA's Pharmacy Compounding Advisory Committee met to consider whether these substances should be placed on the 503A bulks list, the list of ingredients that state-licensed pharmacies may use in compounding. As reported by AJMC, the committee narrowly recommended BPC-157, KPV, TB-500, MOTS-c, epithalon and Semax, voted against DSIP, and did so even though FDA staff had recommended against all seven.

Those votes are advice to the FDA, not decisions. As of this writing, none of these peptides has been added to the bulks list; the FDA would have to accept the recommendations and complete notice-and-comment rulemaking first. The committee also weighed eligibility for compounding, not whether the peptides work. Rules in this area are changing, and we update this page when the FDA acts.

Sermorelin has a different history

Sermorelin, which prompts the pituitary gland to release your own growth hormone, was once FDA-approved under the brand name Geref. The manufacturer discontinued it in 2008, and the FDA later determined it was not withdrawn for reasons of safety or effectiveness. Sermorelin available today is compounded, which means it is not FDA-approved and has not been FDA-reviewed for safety or effectiveness.

How strong is the evidence?

For approved peptide drugs, the evidence comes from large randomized trials. For most wellness peptides, the evidence is mainly from cell studies and animal experiments, with few or no well-designed human trials. A plausible mechanism in a rat is not proof that a peptide will heal your tendon, improve your sleep or slow aging. USADA notes, for example, that there are no human clinical trials establishing that BPC-157 is effective.

Long-term human safety is also largely unknown. That does not mean these peptides are necessarily harmful, but it does mean anyone using them is accepting uncertainty, and an honest clinician should say so.

Why research-use-only peptides are a bad idea

Peptides sold online as research chemicals are not made for human use, and nobody checks the identity, purity, dose or sterility of what is shipped. There is also no clinician reviewing your history, medications or labs. If you are going to explore a peptide, doing it through a licensed prescriber and a licensed pharmacy at least adds accountability, even though it does not make an unapproved compound proven.

How HealifyMD approaches peptides

A clinician reviews your history and baseline labs first, because common problems like thyroid disease, low iron, poor sleep or low hormones are often the real cause of symptoms people hope peptides will fix. If a compounded peptide is prescribed, you should know the pharmacy, the goal, what evidence exists and when you will review whether to continue. We do not publish home dosing instructions for compounded peptides; your clinician sets any regimen.

If a peptide is not working after the review point you agreed on, stopping is a perfectly reasonable outcome. Tell your clinician about every supplement and medication you take, and report any injection-site redness, swelling or unusual symptoms promptly.