What are GHK cu (Glycyl Histidyl Lysine Copper) injections? The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit GHK CU Peptide for Skin Rejuvenation Wittmer Rejuvenation Clinic GHK Copper Peptides: for Skin and Hair Beauty (Paperback) Harvard Book Store GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy