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 Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu Peptide for Hair Growth: Science, Benefits, and How It Works GHK CU Copper Peptides for Hair Growth Benefits Mayraki Intense Hair Treatment with Copper Peptide GHK Cu, DHT Blocker for Thicker, Stronger Hair Growth 45 ml 1.52 fl. oz in Kenya Whizz Hair Regrowth Treatments Amazon.com : Mayraki Intense Hair Treatment with Copper Peptide GHK Cu, DHT Blocker for Thicker, Stronger Hair Growth 45 ml 1.52 fl. oz : Beauty & Personal Care