GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia Mayraki Hair Growth Serum Intense with Copper Peptide GHK Cu Hair Growth Serum for Woman and Man, Hair Growth Oil, Hair Regrowth Treatment, Hair Copper Peptide Hair Growth Treatment GHK cu, AHK cu, Licorice Root Extract, Ginseng Root Extact Hair Growth Serum Intense with Copper Peptide GHK Cu 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