Copper Peptide Ghk Cu 99% Skin Care Ghk Cu 50mg 100mg vials Cosmetic Ingredient GHK GHK CU and blue copper A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Your copper peptide product should be this exact blue. If it isn't, you already have your answer. GHK Cu is blue because of coordination chemistry, not dye. The Cu ion at the center 7% GHK Cu Accelerant Copper peptide(GHK Cu) TFA salt 89030 95 5 FC138108 DUO 25ml by InfiniWell