Introduction GHK Cu is a copper peptide complex formed from the tripeptide glycyl L histidyl L lysine bound to copper. This compound has garnered significant attention in both laboratory and formulation research due to its critical role GHK Cu Copper Peptide Serum Suero facial antienvejecimiento para reafirmar la piel, reduccin de arrugas, hidratacin y aumento de colgeno, 1.0 fl oz (1 onza lquida) : Belleza y Cuidado Personal Amazon.com A GHK Cu face serum appears blue because the active ingredient, GHK Cu (copper peptide), is naturally a blue colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue Comprar pptido de cobre GHK Cu (CAS 89030 95 5) Runtai Chemical GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy