GHK Cu Hair Growth Serum Proven Copper Peptide, $299 If your hair has been thinning, shedding, or just not growing like it used to meet GHK Cu (copper peptide) , This tiny peptide is one of the most underrated hair regrowth ingredients out there Almost 4 months on GHK Cu hair growth progress : r tressless 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