FDA to weigh easing limits on unproven peptides FDA Targets GLP 1 and Peptide Compounding, Advertising and 'Research Use Only' Labeling BPC 157: Experimental Peptide Creates Risk for Athletes 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 takes first step in possible reversal of ban on some peptides The Washington Post