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, Compounded GHK Cu Cream: The Copper Peptide Breakthrough for Skin Repair & Anti Aging Restorative Compounding Pharmacy + Wellness 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper Molecular crystal structure of the tripeptide GHK Cu. In solution, Download Scientific Diagram