Bounce Back Better with Peptides for Injury Recovery GHK Cu (Copper Peptide) LeadWest Medical The Glow Peptide Protocol: Enhance Your Skin's Vitality And Radiance GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? GHK Cu is getting a lot of attention right now, and for good reason. This is not just a skin peptide. It's a copper binding tripeptide with documented effects on gene expression, collagen synthesis, The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds,