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 (Copper) For Sale (50mg) Core Peptides GHK Cu (100 MG) Sigma Compounds Nanoengineered Self Assembling Peptides with Increased Proteolytic Stability Promote Wound Healing ACS Applied Materials & Interfaces Copper Peptide 49557 75 7 GHK Cu 50mg Lyophilized Peptide PatriotChems
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