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 Tired of Feeling Tired All the Time? Make IV Infusion Therapy Part of Your Monthly Wellness Routine: Enrich Family Practice: Family Practice What To Avoid When Taking Glutathione Ghk Cu Shampoo Copper Peptide Hair Growth Best Peptide for Hair Growth Copper Peptide Shampoo