GHK CU Skin Health: Day 1 Report GHK Cu Copper Peptide Supplement, Promotes Skin Repair, Reduces Wrinkles eBay Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true?, Copper peptide, known as GHK Cu, has a growing body of peer