The Peptide Craze Part 2: BPC 157, NAD and the Truth Behind the Longevity Molecule Hype Are peptides legal? This has been answered with a decisive regulatory crackdown , The FDA has moved beyond general oversight into targeted enforcement. Popular wellness peptidesincluding BPC 157, FDA Is Expected to Lift Restriction on Peptides, Heeding RFK Jr.'s Wishes The New York Times RFK Jr. promotes peptides. Now the FDA weighs easing limits on the unproven chemicals What are peptides? The treatments promising weight loss and better skin, explained Vox