The Secret Your Skin Already Knows GHK Cu is not a random combination of letters. It is a naturally occurring copper peptide that helps your skin do what it already knows how GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy Meet GHK Cu, the copper peptide that regenerates and protects. It helps stimulate collagen, improves skin quality, supports hair growth, and fights inflammation for healthier, stronger skin. Contact us at 065 559 Meet GHK Cu, the copper peptide that regenerates and protects. It helps stimulate collagen, improves skin quality, supports hair growth, and fights inflammation for healthier, stronger skin., Effects of Copper Tripeptide on the Growth and Expression of Growth Factors by Normal and Irradiated Fibroblasts Jeffrey D. Pollard, Susan Quan, Thomas Kang, R. James Koch, 2005