What is NAC and what is Glutathione? Catabolism of extracellular glutathione supplies cysteine to support tumours Nature Enhanced glutathione production by bifunctional enzyme coupling with ydaO based ATP regulating system in Escherichia coli ScienceDirect Glutathione is such an important antioxidant in human physiology, meaning it acts to combat oxidative stress. Strategies for increasing glutathione include: Consume sulfur rich foods like cruciferous vegetables Ensure you get