Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum eBay Has anyone tried aGHK CU serum for hair? It's a copper peptide based serum for hair. : r FemaleHairLoss 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 GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B