GHK CU Pure Pharma Australia 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 How to Mix Scantifix GHK Cu Cosmetic Peptide with Hyaluronic Acid Serum Step by Step Tutorial YouTube Mistakes Mixing GHK CU Peptides with Hyaluronic Acid Bellahut COPPER (GHK Cu) With Copper Tripeptide 1 (1% Solution )