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 GHK CU Research Peptide Alpha Carbon Labs GHK CU 100mg Bio Pulse Peptides GHK CU C2 Peptides
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what color is ghk cu peptide GHK Copper Peptide | GHK-Cu