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. Is BPC 157 Legal? Understanding Its Status and Implications Why Are People Injecting Themselves with Peptides? The New Yorker When will the FDA reclassify BPC 157 to Category 1? Odds & Predictions FDA takes first step in possible reversal of ban on some peptides The Washington Post