can you mix ghk cu with hyaluronic acid 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 aging actives paired with 1.50% Sodium Hyaluronate for immediate and lasting hydration Copper Peptide (GHK-Cu) Pro Skin
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