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 GHK Cu: The Midlife Peptide Your Skin Has Been Missing (and Why It's Not Just About Wrinkles) Relished Food Holistic Nutrition Juvasonic + Vitali Copper Peptide (GHK Cu) Bundle GHK Cu 100 mg High Purity Copper Peptide Proliven Labs