A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true?, Copper peptide, known as GHK Cu, has a growing body of peer GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper