GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B The Blue Revolution: Why 1% Pure GHK Cu is the New Standard for Mature Pure & Cimple 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 Blue Copper Peptide GHK CU Serum Hyaluronic Acid Anti Wrinkle Brightening 100ml eBay