By age 30, your skin produces about 25% less collagen. By 40, that number can reach 40%. This decline affects more than just how your skin looks. It changes how it heals, FDA Reverses Peptide Ban: BPC 157, GHK Cu Back! The FDA has restored BPC 157, GHK Cu, and 12 other crucial peptides to legal compounding status, effective 2026 under RFK Jr.'s HHS leadership. This means GHK Cu Copper Peptide Benefits, Uses & Safety Intra V GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes