GHK CU COPPER PEPTIDE 5MG 10MG 50MG 100MG VIAL UMBRELLA Labs 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 Peptide Labz Copper Peptide Hair Growth Serum, 10% GHK cu, 5% AHK cu, Rejuvenates Follicles Walmart.com Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience Copper Peptide Hair Regrowth Formula GHK CU & AHK CU, Copper Peptide Hair Growth Treatment Serum For Men & Women Fruugo NO Amazon.com : Truth Guy GHK CU Anti Aging Copper Peptide Serum for Skin & Hair Growth, with Carbon 60 for Fuller Hair, Beard and Lashes Boost Hair Growth & Reduce Aging Effect One