GHK Cu Copper Peptide Troche Skin, Collagen & Healthy Aging AgeMD GHK Cu 50mg Skin & Tissue Repair Research Peptide Copper Peptide Mythos Skincare GHK Cu Capsules Nordsci Most people think GHK Cu works because it's a skin peptide. That's surface level thinking. #GHK Cu doesn't start with wrinkles, scars, or hairlines. It starts with cellular repair signalling. GHK Cu is a copper peptide