BLUE Copper Peptide GHK CU Serum with Hyaluronic Acid Anti Wrinkle Assortment eBay Pure Chemicals at Wholesale: China Wholesale Ghk Cu Products at Factory Prices Global Sources 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 Blue Copper Ghk cu Peptide Manufacturers Suppliers Factory Salispharm