Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum eBay Hair Growth Serum Intense with Copper Peptide GHK Cu Mayraki Professional Private Label Ghk Cu Copper Peptide Serum for Hair 10% 5% Ahk Cu Serum Hair Growth Treatment Strong Hair Roots Alibaba.com Two Ingredients. Real Hair Transformations. How Neurogan Health's GHK Cu Serum Is Changing What Customers Expect From Hair Care GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health