Theoretical study of copper binding to GHK peptide ScienceDirect China Copper Peptide(GHK Cu) CAS:89030 95 5 Manufacturers Free Sample Alfa Chemical Ghk Cu Copper Peptide: Uncover Its Full Potential Is Less More? Influence of the Coordination Geometry of Copper(II) Picolinate Chelate Complexes on Metabolic Stability Inorganic Chemistry Buy GHK Cu 50mg & 100mg Copper Tripeptide Koi Peptides 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