Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare GHK Copper Peptide GHK Cu Tripeptide 1 Expression and Purification of Recombinant GHK Tripeptides Are Able to Protect against Acute Cardiotoxicity from Exposure to Waterborne Copper in Zebrafish 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,