GHK Cu: Skin Healing, Anti Aging, & Hair Growth Benefits I think everything I did for my scars worked synergistically and helped, but if I had to choose one product, it would be GHK Cu (aka copper peptides)., Now one year later I see the resultsand theyve GHK Cu Copper Peptide Serum Scar Repair & Collagen Support Studd Muffyn Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare