If you've been down the GHK Cu rabbit hole, you already know. If you haven't, welcome. This is the ingredient that skincare nerds, dermatologists, and anti ageing enthusiasts have been talking about for years. Copper Peptide Duo GHK Cu Anti Aging Serum & Moisturizer Meet the ingredient your skin has been waiting for. GHK Cu, or Copper Tripeptide 1, is one of the most researched anti ageing actives in skincare. It firms. It renews. It supports collagen. And now Neurogan GHK Cu Copper Peptide Face Cream 4% Peptides for Skin Firmness & Deep Hydration Daily Facial Moisturizer with 2400 MG GHK Cu 2oz Buy Now with Express International Delivery GoSupps.com