Powerock Pharma GHK CU 50mg GHK Cu Peptide Regenerative & Cosmetic Research A GHK Cu face serum appears blue because the active ingredient, GHK Cu (copper peptide), is naturally a blue colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue Molecular structure of the tripeptide GHK Cu. In solution lysine Download Scientific Diagram
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