GHK CU 50mg OP Labs (Formerly Oxford Peptides) GHK cu is a copper peptide. It's great for skin, especially when you combine it with other things. My favorite is DMSO and derma rolling. My first experience with copper peptides was Procytes Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms New insights on the skin stack I posted earlier this year. RECAPPING: GHK Cu was developed by a company called Procyte in the 90's. I was an interested follower of Dr. Pickart's work InfiniWell DUO Zinc Topical Hair Growth Product OVitaminPro GHK Cu Liposome Copper Tri Peptide 1 Liquid 10%