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 Skin Perfection Ghk Cu Copper Peptide Powder 99.7% Pure Diy Ghk Powder to Make a Serum for Face Hair Scalp 1g The peptide blend drama explained, Does mixing GHK Cu + TB 500 + BPC 157 actually cause degradation?, I checked the science. #peptides #biohacking #science #peptideresearch #sciencetok #biohacking GHK Copper Peptide GHK Cu Tripeptide 1