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 Acetylcysteine, N acetylcysteine, NAC drug molecule. It is an antioxidant and glutathione inducer. Skeletal chemical formula on the dark blue backgrou Stock Photo Alamy Glutathione Getting the k'NAC'k of Parkinson's disease The Science of Parkinson's VITAONE (NAC) N ACETYLCYSTEINE AutoimmunityCare Glutathione vs. NAC: Why You Should Take NAC for Better Absorption