Neurogan Health Advanced GHK Cu Copper Peptide Face Serum (Ingredients If you're playing with raw GHK Cu, here's the secret that makes it actually work on your skin: mix it with hyaluronic acid. Not microneedling, not fancy devices just a clean Snapklik.com : Skin Perfection Copper Peptide Serum GHK CU 1% For Face & Hair Copper Peptides For Skin, Hair, & Scalp 1% Blue Liquid For Face, Neck, Body, Scalp Multi Use Serum Booster GHK Cu: The Elegant Copper Peptide for Skin and Scalp Renewal Renew Vitality GHK cu 3% Serum Copper Peptide