FDA Peptide Reclassification 2026 Amanecia Health GHK Cu 50mg Copper Peptide Research Grade Midwest Peptide RFK Jr.'s peptide push could unleash risky drugs STAT First Opinion The FDA just changed the rules on peptides effective April 15, 2026. BPC 157, GHK Cu, MOTS C, and TB 500 have been removed from the Category 2 restricted compounding list. Here is what Regulatory Alert: FDA's April 2026 Update on BPC 157 and GHK Cu Holt Law