Glutathione Blood Test Does Glutathione Contain Sulfur? Exploring the Role of Sulfur in Glutathione Production and Health Cymbiotika CYMBIOTIKA Catabolism of extracellular glutathione supplies cysteine to support tumours Nature Molecular Biology, Biochemistry and Cellular Physiology of Cysteine Metabolism in Arabidopsis thaliana 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