Copper Peptide Serum for Dull & Mature Skin VALNCIA GHK Cu Formulation & Manufacturing Expert Guide GHK CU Sky Blue Cream Aseir Custom GHK Cu Blue Copper Peptide Serum One of my patients has shared this picture with me as she felt it was odd that this peptide had this very vivid blue colour, while her other peptides had a clear 3 Ml 5 Ml 10 Ml Ghk Cu Vial Blue Copper Peptide Face Serum Anti Aging Moisturizing Repairing for Skin Care Serum