GHK Copper Peptide GHK Cu Tripeptide 1 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 Copper Peptide Serum Capsules ComplexCity Aesthetics HKH Copper Peptides Serum for Face 38 Caps Anti aging Facial Serum Capsules with Hyaluronic Acid