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 People are turning themselves into lab rats': the injectable peptides craze sweeping the US Well actually The Guardian Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum eBay AHK Cu (Copper Tripeptide 3) Ingredient Guide Nubeean Noosa