Injectable GHK Cu: Beginner's Guide to Copper Peptide GHK Cu: My secret weapon for skin, hair, and healing, I use it two ways topical cream for my face, and subQ injections 3x a week., It boosts collagen, tightens skin, helps hair grow, and even GHK Cu (1) Quality Approved If you're using GHK Cu and it stings a little (which is common) this one's for you In this reel I'm sharing the small tweaks that have helped me make peptide injections A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend