GHK Cu Peptide 100mg For Copper Binding Research GHK Cu Injectable Team Wellcore GHK Cu Copper Peptide Skin & Healing Beverly Hills BLUE Copper Peptide GHK CU Serum with Hyaluronic Acid Anti Wrinkle Assortment eBay 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 GHK Cu Topical Cream