ghk-cu blue color Ever wonder why is blue? 💙, The comes from copper itself. When the GHK peptide binds to a copper ion, it forms the active copper peptide complex (GHK-Cu), creating its signature hue. Cu Blue Copper Peptide and Betaine GHK-Cu Blue Copper Peptide Serum
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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18


















