GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia Hair Growth Serum Intense with Copper Peptide GHK Cu Two Ingredients. Real Hair Transformations. How Neurogan Health's GHK Cu Serum Is Changing What Customers Expect From Hair Care Hair Growth Serum Intense with Copper Peptide GHK Cu 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