Does it work? Maneup GHK Cu hair growth serum : r tressless Hair Growth Serum Intense with Copper Peptide GHK Cu Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum Skinworks GHK Cu peptides are used to potentially promote hair growth, increase hair follicle size, and improve scalp health, often for conditions like androgenetic alopecia. As a regenerative peptide, GHK Cu is