Most antioxidants come from your diet. This one your body makes itself, and it's arguably the most important one you have. Glutathione supports immune function, detoxification, brain health, and digestion. The problem Cognitive Function In Depth Linus Pauling Institute Oregon State University Quantification of Glutathione and Its Associated Spontaneous Neuronal Activity in Major Depressive Disorder and Obsessive Compulsive Disorder Biological Psychiatry Frontiers The role of glutathione in cognition, cognitive effort, and cognitive endurance in young and older adults