In peptide research, synergy matters. Some compounds may offer greater insight when studied together, and GHK Cu and AHK Cu are two peptides drawing attention for that reason. Different biological pathways Distinct New Biotinylated GHK and Related Copper(II) Complex: Antioxidant and Antiglycant Properties In Vitro against Neurodegenerative Disorders 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 What is GHK Cu Peptides for sale Polaris peptides RCSB PDB 6QUG: GHK tagged MBP Nup98(1 29) China Copper Peptide(GHK Cu) CAS:89030 95 5 Manufacturers Free Sample Alfa Chemical