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 Original GHK Copper GHK Copper: Restores Beauty and Diminishes Wrinkles for Younger Looking Skin by Dr. Loren Pickart of Skin Biology Buy or Shop Skin Biology Products Call 1 800 405 1912 The GHK Cu Peptide: Benefits, Uses, and Why it's Known as the Regenerative Copper Complex BPC 157 vs TB 500 vs GHK Cu Inside the GLOW Protocol Revolution Health & Wellness Copper Peptide (GHK CU) Serum Australian Private Label Skin Care Cellular Cosmetics Liposomal Glutathione Setria Antioxidant 60 Capsules (30 Servings) GNC