Amazon.com : Bloom Clinically Proven Copper GHK CU Peptide Hair Serum for Hair Growth Non Greasy & Lightweight Advanced Multi Copper Peptides for Thinning Hair Made in USA 3 Pack for 3 Ghk Cu Shampoo Copper Peptide Hair Growth Best Peptide for Hair Growth Copper Peptide Shampoo GHK Cu Copper Peptide Shampoo Anti Hair Loss Shampoo Promotes New Peptide Labz AHK CU + GHK CU Hair Serum Pro 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 GHK Peptide Hair Growth Clinical Trial (2016) Research Summary Hairgenetix