FDA Puts BPC 157, TB 500, and 5 Other Peptides Under the Microscope: What Prescribers Need to Know About the 503A Review Lengea FDA's Overreach on Compounded Peptides The FDA may be about to change everything for peptide research. Secretary RFK Jr. announced plans to move 14 peptides from Category 2 to Category 1. That means FDA recognized. Potentially prescribable through BPC 157 FDA Approval Status 2026: RFK Jr, Advisory Committee & Reclassification