GHK Cu Peptides Benefits for Anti Aging Skin Rejuvenation How to Use With Micro Infusion GHK Cu is a copper peptide that plays a role in tissue repair and collagen synthesis. The result: improved texture, firmness, and overall skin quality. Glow Serum with Copper Peptides and Vegan Collagen HigherDOSE Sephora Modulation of Fibroblast Phenotype and Collagen Synthesis by GHK Cu in Prime Lab Peptides Cellular Glow Copper Peptide GHK Cu Serum for Face