A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Amazon.com: Copper Peptides Serum for Face Peptides Collagen Renewal & Anti Aging Serum GHK Cu, EGF, Hyaluronic Acid,Collagen Anti Wrinkle, Firming, Moisturizing Korean Skin Care,25mL 0.88 Fl Oz : Beauty & Personal Care GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK NAD+ + GHK Cu One could support cellular energy + longevity the other could support repair, collagen + glow. Both could be the ultimate inside out upgrade. Because looking better is cute Understanding the Difference Between Glow and GHKCU Peptides