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 Copper Peptide Anti Aging Serum Booster for DIY Face Cream & Hair Tonic GHK Cu Tripeptide 1 for Youthful Skin, Collagen Boost, and Anti Wrinkle Results Buy Now with Express International Delivery GoSupps.com GHK Cu 100mg Peak Haven GHK CU Royal Blue Serum Aseir Custom
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