Ghk Cu Peptide Powder Color Blue 50mg GHK Cu Vial Blue Copper Peptide Face Serum Age Aging Moisturizing Repairing for Skin Care Serum Facial Care Kit d Ward What make blue? . The blue color of GHK Cu is due to the copper ion mineral bound with the peptide. The binding occurs through the donation of electrons Buy High Purity GHK Cu Blue Powder Copper Peptide CAS 49557 75 7 89030 95 5 Cosmetics Grade from Hangzhou Hyper Chemicals Limited ECHEMI