GHK Cu Copper Peptide 0.5% (topical foam) I compared Peptides, Topically! Topical GHK Cu and One Skin OS 01 HAIR Peptide Scalp Serum , See what I used for my Hundreds of my Clients and what I used myself! Its shocking!!! , Here is the link AHK CU + GHK CU Hair Serum Pro GHK Cu Peptide Hair Growth 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 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care