Some peptides are FDA approved drugs. Some are legal supplements. Some are neither. The same word, peptide, covers all three categories. The regulatory status of the specific compound is what determines legality. FDA Is Expected to Lift Restriction on Peptides, Heeding RFK Jr.'s Wishes The New York Times Gray Market Peptides: So Much Hype, So Little Data What are peptides? FDA may ease restrictions on unproven health fad LiveNOW from FOX