Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience GHK Cu Copper Peptide Serum 1% Black Tie Health Two Ingredients. Real Hair Transformations. How Neurogan Health's GHK Cu Serum Is Changing What Customers Expect From Hair Care GHK Cu for hair loss. Does it actually work? Let the science answer. Hair loss happens when follicles miniaturize, inflammation attacks them, blood supply weakens, and stem cells go dormant. GHK Cu addresses several GHK Cu 50mg Advanced Skin Rejuvenation & Healing Power