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. Which non FDA (United States Food and Drug Administration) approved peptides, such as BPC 157 (Body Protection Compound 157) and TB 500 (Thymosin Beta 500), are likely legitimate for medical use under strict supervision? The Emerging Risk of Peptides in Supplements LegitScript Understanding the Legal Risks of BPC 157 and Other Unapproved Peptides Holt Law How did BPC 157 become the wellness industry's star peptide? FDA Moves on Peptides: What Compounding Pharmacies Need to Know