GHK Cu Peptide: Benefits for Tissue Repair, Healing, and Recovery Revolution Health & Wellness GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health Ghk Cu Etsy 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 Buy GHK Cu Cream 0.5% Copper Peptide Pure, Potent, USA Made Topical GHK Cu: Skin Benefits, Best Forms, and Where to Buy