This is one of the biggest peptide regulatory updates in years, and it's just the beginning. The FDA has officially initiated the first step to reverse its 2023 stance, removing 12 peptides GHK Cu Copper Tripeptide 1 Research Reagent FDA Peptide Reclassification 2026: What Researchers Want 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