This is a product I purchased on Amazon, so I want to give it a quick review. *~Dumie GHK CU Facial Serum~* This is a Copper Peptide serum that is working amazingly for GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience 2 weeks in on GHK Cu and the glow is REAL., Brighter complexion, More even skin tone, Less breakouts, Softer fine lines, Thicker, fuller hair, This is just the beginning. Consistency is How important is protein kinase C in opioid receptor desensitization and morphine tolerance? ScienceDirect Blue Me Away: Skin Biology 7% GHK Cu Accelerant Review BeautyandtheCat's Beauty Blog