GHK Cu Wholesale Pricing GHK Cu Cooper Peptide: The Complete Skin & Repair Guide (2026) 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 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 Are Peptides Legal Again in 2026? Here is what RFK Jr. Just Announced