Inside the viral world of peptides | CNN

Inside the viral world of peptides

By Bijan Hosseini, CNN

Published 10:24 AM EDT, Fri July 31, 2026

Inside the viral world of peptides

Injectable peptides have been popping up all over the internet with promises to help people lose weight, build muscle, improve skin health and even repair tissue. But beneath the viral hype lies a fast-growing global grey market, where experimental compounds are bought and sold online with little oversight or regulation.

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