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 China Cosmetic Grade Anti aging Copper Peptide GHK CU Peptide CAS 49557 75 7 factory and manufacturers Biof What is GHK Cu? Copper Peptide Benefits Explained ION BLUE ION BLUE Glutathione IV Treatment in Houston TX Infuzed Therapy 1% GHK CU solution: is this applied directly on skin or diluted further? : r DIYaesthetics