Advanced GHK Cu Neck & Face Serum Premium Quality Detection of Reactive Metabolites Using Isotope Labeled Glutathione Trapping and Simultaneous Neutral Loss and Precursor Ion Scanning with Ultra High Pressure Liquid Chromatography Triple Quadruple Mass Spectrometry Analytical Chemistry Glacier Glow Shop Not all Copper Peptides are created equal If you've tried copper peptides before and saw no change, here is why: Concentration and Stability. Most serums use a diluted solution that barely scratches 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