GHK Cu Purepep GHK Cu for Skin: SIGNAL's Guide to Rejuvenation 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 Skin Needling How Does It Work Microneedling Serums and Creams to Use for Scar Removal Use Copper Peptides for Scar Reduction