The Human Lab Rats Injecting Themselves with Peptides Office for Science and Society McGill University Is BPC 157 Legal? Understanding Its Status and Implications BPC 157 has already hit the mainstream, but should it hit your bloodstream? 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. What are peptides? The treatments promising weight loss and better skin, explained Vox