Most people think GHK Cu works because it's a skin peptide. That's surface level thinking. #GHK Cu doesn't start with wrinkles, scars, or hairlines. It starts with cellular repair signalling. GHK Cu is a copper peptide GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Glutathione Replenishment Injection Potent antioxidant support for systemic detoxification, hepatic fortification, skin radiance, and enhanced immune function (Glutathione Injection) GHK Cu for Skin: SIGNAL's Guide to Rejuvenation