Understanding the Difference Between Glow and GHKCU Peptides Expression and Purification of Recombinant GHK Tripeptides Are Able to Protect against Acute Cardiotoxicity from Exposure to Waterborne Copper in Zebrafish GHK Cu is a naturally occurring copper binding peptide that plays a major role in tissue repair and remodeling, with a strong focus in research on skin and hair biology. It works by signaling GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Injectable GHK Cu: Beginner's Guide to Copper Peptide