Peptide Therapy for Aesthetics The Villages Infinity Medical Institute Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum 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, Copper Peptides (GHK Cu): Benefits and Side Effects Expression and Purification of Recombinant GHK Tripeptides Are Able to Protect against Acute Cardiotoxicity from Exposure to Waterborne Copper in Zebrafish