Copper Peptide Hair Growth Shampoo GHK Cu for Hair Loss Hairgenetix Buy GHK Cu Peptide For Research Prime Peptides Cellular Glow Hair Serum 10% GHK Cu + 5% AHK Cu Peptides Copper Peptide 10% GHK CU, 5% AHK CU peptides Hair Growth Treatment Serum GHK Cu for hair growth does it actually work? Short answer: no. GHK Cu can be great for skin but when it comes to hair growth, the evidence just isn't there. And this