Buy Blue Copper Peptide Powder Ghk cu Copper Peptide Cas 130120 57 9 For Anti allergic Skin Repair Series Pharmaceutical Grade from Dongguan Chenguang Technology Co., Ltd. ECHEMI Close Blue Copper Peptides Ghk cu Powder Stock Photo 2682985977 Shutterstock Ghk cu Peptide Face Serum NEW Cobalt Blue Bottle 2 Oz Etsy 50mg GHK Cu Vial Blue Copper Peptide Face Serum Age Aging Moisturizing Repairing for Skin Care Serum Facial Care Kit d GHK Cu Regenerative Toner 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