NAC vs Glutathione: Comparing Antioxidant Powerhouses for Your Health IVDrips Acetylcysteine, N acetylcysteine, NAC drug molecule. It is an antioxidant and glutathione inducer. Skeletal chemical formula on the dark blue backgrou Stock Photo Alamy GHK CU Averix Labs NAC is more than an antioxidant it's the building block of glutathione, the body's most powerful defense molecule. Unlike many supplements, NAC has decades of clinical use supporting: Respiratory health