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 Parents & teen athletes: not everything trending on social media is safe., Copper peptides like GHK Cu are being promoted for skin health, but these products are unregulated and not FDA approved, GHK Cu True Lab Peptides FDA Peptide Reclassification 2026: What Researchers Want GHK Cu FDA Approval Status 2026: Not Approved