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. Peptides Lack Reliable Safety Information, Watchdog Warns FDA Puts BPC 157, TB 500, and 5 Other Peptides Under the Microscope: What Prescribers Need to Know About the 503A Review Lengea BPC 157 Banned: Key Facts on the Latest FDA Decision Compounded "semaglutide" is not FDA approved semaglutide.com