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 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 Copper Peptide Hair Growth Serum (GHK Cu & AHK Cu) GHK Cu Focal Point Vitality 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