Comments Glutathione to know more.. Do you use any supplement? #dermatologist #jivishaclinic #skincaretips #healthyskin #glutathione Blue Copper Ghk cu Peptide Manufacturers Suppliers Factory Salispharm Glutathione: Uses, Dosage, Side Effects Vinmec 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