Peptide Research Overview Mechanisms, Applications & Insights 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 Amazon.com: GHK Cu Copper Peptide Powder 99.7%+ Pure Cosmetic Grade Ingredient for DIY Serums, Creams & Scalp Tonics Supports Collagen & Fuller Hair (1g) : Beauty & Personal Care GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration GHK Cu [50mg] Elixser Peptides January 2026 FDA New Drug Approvals Zycubo (copper histidinate) Some approvals mark progress. Others redefine what hope looks like. In January 2026, the U.S. FDA approved Zycubo (copper histidinate injection formerly