Glutathione Uses, Benefits, Side Effects And Medicines Young Goose Blue Peptide Spray 14 Glutathione Benefits for Your Body and Health Annex Naturopathic Clinic Glutathione Benefits for Your Skin and Side Effects Dr Sabrina 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