GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Blue Copper Ghk cu Peptide Manufacturers Suppliers Factory Salispharm GHK Copper Peptide GHK Cu Tripeptide 1 Buy GHK Cu 50mg Peptide COA Verified UK Blue Copper Ghk cu Peptide Manufacturers Suppliers Factory Salispharm 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