Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience Two Ingredients. Real Hair Transformations. How Neurogan Health's GHK Cu Serum Is Changing What Customers Expect From Hair Care This is what the combination of microneedling, peptides and consistency can do These photos are results from scalp restoration using GHK CU from @neuroganhealth How does this treatment work? Microneedling is used Male Hair Restoration Before & After with PRF and GHK Cu