GHK Cu [50mg] Elixser Peptides 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 peptide regulatory landscape in 2026 is in active flux. After the FDA placed 19 popular peptides in Category 2 in late 2023, HHS Secretary RFK Jr. announced in February 2026 that Buy GHK Cu Peptide 99%+ Purity GHK Cu for Research