Question 295 of 433
What are peptides, and why is everyone talking about them?
The short answer
Short chains of amino acids that act as signals in the body. Some are excellent approved medicines. Most of the ones sold for healing and anti-aging have never been properly tested in people.
Insulin is a peptide. So are the GLP-1 medicines. So are two approved drugs you may hear about: tesamorelin, approved for abdominal fat in people with HIV, and bremelanotide, approved for low sexual desire in premenopausal women.
The peptides in the wellness market are different. They are sold on the strength of animal studies, athlete testimonials, and podcasts. They are usually injected.
“This book is for education. It is not medical advice, and reading it does not make you my patient or create a doctor-patient relationship.” From the book’s medical disclaimer. Full disclaimer
MIXED — Approved peptide drugs have indication-specific trials; wellness peptides do not inherit that evidence.Evidence grade (draft mapping)BLimited or small human studiesPart 20, Q295 · Sources: R12
Sources cited
- R12 US Food and Drug Administration. Pharmacy Compounding Advisory Committee meeting materials, July 23–24, 2026. Link pending verification
From Longevity Unmasked by Afshine Ash Emrani, MD, FACC. Medical disclaimer. This book is for education. It is not medical advice, and reading it does not make you my patient or create a doctor-patient relationship. Nothing here is meant to diagnose, treat, cure, or prevent any disease. Medicine is personal: a test, drug, supplement, or exercise plan that helps one person can harm another. Do not start, stop, or change any medication or treatment because of something you read in these pages. Talk with a licensed clinician who knows your history first. If you think you are having a medical emergency, call 911. The author disclaims responsibility for any loss or harm arising from use of the information in this book.