Biological Indicators of Oxidative Stress [Malondialdehyde, Catalase, Glutathione Peroxidase, and Superoxide Dismutase] and Their Application in Nutrition Springer Nature Link Studies show children with autism have significantly lower levels of glutathione, the body's master antioxidant. Without enough glutathione, the body struggles to eliminate toxins, making it harder to cope with everyday Measurement of superoxide dismutase, catalase and glutathione peroxidase in cultured cells and tissue Nature Protocols Glutathione PPTX