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 : . Dr. Shintre breaks down what it is and why it works. ? A copper based peptide that naturally occurs in your Glow from within with GHK Cu Copper Peptide , This powerhouse peptide supports collagen production, skin repair, and hair follicle health, helping improve skin firmness, radiance, and support GHK Peptide Hair Growth Clinical Trial (2016) Research Summary Hairgenetix