FDA to weigh easing limits on unproven peptides favored by RFK Jr. and MAHA supporters PBS News BPC 157 is one of the peptides that has been getting a lot of attention recently. It is a synthetic peptide derived from a protein found in human gastric juice. In experimental research, 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