I ran GHK Cu for 12 months so you dont have to (here are the results) Amazon.com : GHK Cu Copper Peptide Powder, CAS 49557 75 7, Purity 99+%, 1 Gram : Health & Household GHK Cu Copper Peptide Research BioStrata 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 Cosmetics Grade Skin Care Anti Wrinkle Anti Aging Raw Materials Blue Powder Copper Peptide Ghk Cu Tripeptide 1 Ghk Cu 99% Purity Copper Peptide, Anti Aging Blue Ahk Cu Made in China.com