PDF) Prefrontal cortex glutathione S transferase levels in patients with bipolar disorder, major depression and schizophrenia Vitamin D and depression in older adults: lessons learned from observational and clinical studies Nutrition Research Reviews Cambridge Core I spent 4 years talking about mental health and the connection to the gut brain axis. At the time I thought I was reaching the root of the problem by addressing the Glutathione in Mental Disorders: Mechanisms and Therapies