Peptides: what's promising, what's proven, and what's right for you
Peptides are short chains of amino acids. A few, such as insulin and the GLP-1 medicines, are FDA-approved after large trials. Most peptides sold for healing, healthy aging or focus are interesting but early: the research is mainly in animals. Since October 2026, regulators have said they won't act against licensed pharmacies compounding six of them under set conditions. That isn't FDA approval.
Reviewed by Darshan Patel, MD, Obesity medicine physician, on 2026-11-12. Next review 2026-12-12.
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Why so many people are asking about peptides
Peptides are everywhere right now, from podcasts to group chats. People hear they can help them heal faster, sleep deeper, think sharper or age better. Those are great goals. This guide sorts what's promising from what's proven, so you can put your time and money where the evidence is.
What peptides are
A peptide is a short chain of amino acids, the building blocks of proteins. Your body makes thousands of them as hormones and signals. Some peptide medicines have been through large trials and FDA review: insulin, the GLP-1 medicines semaglutide (Wegovy, Ozempic) and tirzepatide (Zepbound, Mounjaro), and tesamorelin (Egrifta) for belly fat linked to HIV treatment. The peptides you see online and in wellness clinics are a different group, and most haven't been through that process yet.
What's promising, what's proven
We grade the evidence for the uses people buy these products for:
- A: several large randomized trials in people agree.
- B: at least one well-run randomized trial in people, or several smaller ones that agree.
- C: human evidence is limited to small, short or uncontrolled studies.
- D: mostly animal or lab studies; human studies are absent or come from a single research group.
| Peptide | Sold for | Evidence | In the HHS policy? |
|---|---|---|---|
| BPC-157 | Injury and gut healing | D | Yes: injection, oral, topical |
| TB-500 | Injury recovery | D | Yes: injection |
| MOTS-c | Metabolism and exercise | D | Yes: injection |
| Epitalon | Healthy aging and sleep | D | Yes: injection, in courses |
| Semax | Focus, memory, stroke recovery | C | Yes: nasal |
| KPV | Gut and skin inflammation | D | Yes: oral, topical |
| Sermorelin | Growth hormone, body composition | C | No: separate rule for approved-drug ingredients |
| NAD+ (not a peptide) | Energy and healthy aging | C | No |
| Glutathione | Skin, energy, "detox" | C | No: status not settled |
| CJC-1295 and ipamorelin | Growth hormone, muscle, sleep | D | No |
| GHK-Cu | Skin and hair | C on skin, D injected | No |
| Tesamorelin | Belly fat | C off-label | No: an FDA-approved drug for one use |
For comparison, the GLP-1 medicines semaglutide and tirzepatide earn an A for weight loss: each was tested in large trials with thousands of people.
Do "anti-aging" peptides work?
Not that anyone has shown in people yet. No peptide has been shown in human trials to slow aging or extend life. Several have interesting animal and lab results, which is why they get attention, though animal findings often don't hold up in people. The steps with the strongest evidence for a longer, healthier life are on our healthy aging page, and a physician can help you with most of them today.
Talk to a physician about your goal
Behind almost every peptide question is a goal: heal an injury, lose weight and keep muscle, sleep better, have more energy. Those goals deserve a real plan.
- Lose weight and keep it off. Aayu Elevate™ brings video visits with an obesity medicine physician, a registered dietitian, and medicine when it's right for you.
- Feel better day to day. Aayu Elevate Plus™ adds care for common conditions such as depression, anxiety and sleep problems.
- Get a straight answer on peptides. Bring what you've read to your visit. We don't prescribe peptides right now, but your physician will review everything you take and tell you what the evidence says.
Most major insurance accepted, plus convenient cash pay options. Book my consultation
Is it legal now?
FDA moved six peptides off its list of substances with significant safety risks on April 22, 2026. Then, on October 30, 2026, HHS said it won't act against licensed pharmacies that compound those six for a specific patient under ten conditions. That helps steer people toward pharmacy-made products, though it isn't FDA approval. Our legal status page has the details and is updated monthly.
Where a peptide comes from matters
If you use a peptide, get it with a prescription from a licensed pharmacy. Under the HHS policy, that means an ingredient from an FDA-registered manufacturer with a certificate of analysis, and a proper compounded-drug label. Products labeled research use only skip those steps, and they aren't made for people. Our checklist for choosing a peptide clinic can help, and here's why the research-use-only label matters.
Why people trust our answers
- Every guide is reviewed by a physician, Darshan Patel, MD, an obesity medicine physician.
- Every guide lists its sources, so you can check them yourself.
- Peptide guides are reviewed every month, because the rules are changing fast.
- Read how we grade evidence in our editorial policy.
Where Aayu Well stands
We don't prescribe the peptides on this page right now. We publish these guides so you can weigh the evidence with a physician, and we'd be glad if that physician is one of ours.
Questions people ask
Can I talk to an Aayu Well physician about peptides?
Yes, and we'd encourage it. Bring what you've read to your visit. We don't prescribe peptides right now, but your physician will go over the evidence with you, review everything you take, and build a plan for the goal behind the question.
Are peptides steroids?
No. Steroids are built from cholesterol; peptides are made of amino acids. Some peptides are still banned in sport, so athletes who are drug tested should check before using one.
Is semaglutide a peptide?
Yes. Semaglutide and tirzepatide are peptide medicines. The brand-name versions went through large trials and FDA review; compounded versions are not FDA-approved.
Which peptides are legal?
Peptides approved as medicines are legal with a prescription. Six others can be compounded by licensed pharmacies under the October 2026 HHS policy, which is enforcement discretion rather than approval. Our legal status page lists them and is updated monthly.
Not sure what's worth your time? Ask a physician.
In one video visit, an obesity medicine physician looks at your goals, your health history and anything you're taking, and helps you choose what's worth your time and money. Most major insurance accepted, plus convenient cash pay options.
Sources
- HHS: Enforcement Discretion Policy Regarding 503A Compounding Using Certain Peptide Bulk Drug Substances, Appendices A and B (October 2026)
- Federal Register notice FR Doc. 2026-22192, 91 FR 68526 (October 30, 2026)
- FDA: Human drug compounding
- Wilding JPH, Batterham RL, Calanna S, et al. Once-weekly semaglutide in adults with overweight or obesity (STEP 1). N Engl J Med. 2021;384(11):989-1002. doi:10.1056/NEJMoa2032183
- Jastreboff AM, Aronne LJ, Ahmad NN, et al. Tirzepatide once weekly for the treatment of obesity (SURMOUNT-1). N Engl J Med. 2022;387(3):205-216. doi:10.1056/NEJMoa2206038
- World Anti-Doping Agency: 2026 Prohibited List, in force from January 1, 2026 (BPC-157 under S0, TB-500 under S2.3, MOTS-c under S4.4.1)
