GHK Cu Hair Growth 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 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care Hair Growth Serum Intense with Copper Peptide GHK Cu GHK Cu The miracle hair growth peptide is coming RFK announced: Peptides like GHK Cu (injectable) are moving categories FDA removing them from restrictive list for regulated compounding access. No more black market.