GHK Cu is getting a lot of attention right now, and for good reason. This is not just a skin peptide. It's a copper binding tripeptide with documented effects on gene expression, collagen synthesis, Copper Peptide (GHK Cu) Supplier Cosmetic Ingredient for Formulators Creative Peptides 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper GHK CU GHK Cu Copper Peptide High Quality R&D, Formulation & Manufacturing Expertise Oraltide Pharma GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy