A major breakthrough in brain science is shedding new light on the biology behind depression. Using advanced imaging, researchers have found that people with major depressive disorder have significantly lower levels of Advancements Exploring Major Depressive Disorder: Insights on Oxidative Stress, Serotonin Metabolism, BDNF, HPA Axis Dysfunction, and Pharmacotherapy Advances Glutathione Deficiency: Are You At Risk? YouTube A major breakthrough in brain science is shedding new light on the biology behind depression. Using advanced imaging, researchers have found that people with major depressive disorder have significantly lower levels of