Ghk Cu Shampoo Copper Peptide Hair Growth Best Peptide for Hair Growth Copper Peptide Shampoo GHK Peptide Hair Growth Clinical Trial (2016) Research Summary Hairgenetix 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 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 Copper Peptide Hair Growth Serum (GHK Cu & AHK Cu)