Topical GHK Cu: Skin Benefits, Best Forms, and Where to Buy They said the Topical Copper Peptide is Cope so we had to show them that it really work!, This maybe is the strongest Topical version in Europe ( 3% Blue Copper Peptide Complex ) , Only found at:, Copper Peptide Regenerating Serum for Glowing Skin and Hair 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