GHK who? Meet GHK Cu, the copper peptide known for supporting collagen production, skin repair, and a healthier looking glow. A small peptide with big skincare benefits. Ghk cu Copper Peptide Repair Serum Firming, Collagen Boost, Skin Renewal, Anti aging Face Serum Etsy GHK Cu is a powerful copper peptide that supports collagen production, skin and hair health, and tissue repair. It may help reduce fine lines, improve elasticity, and promote faster healing. Want to learn 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective?