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? What Peptides Are Legal in the U.S.? Understanding FDA Approval, Compounding, and the Legal Gray Areas BPC 157: Miracle Healing Peptide or Hidden Danger? The peptide problem: Hype is outrunning the evidence FDA Is Expected to Lift Restriction on Peptides, Heeding RFK Jr.'s Wishes The New York Times