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 N2 (N Glycyl L histidyl) L lysinato(2 )]copper 89030 95 5 wiki Buy GHK Cu Exceptional 99%+ Purity Third Party COA Included GHK CU (50mg) Nordsci
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