New research in Biological Psychiatry offers the first direct evidence of diminished 5-HT release cements “serotonin hypothesis.” Researchers have postulated since the 1960s that major depression stems from disruptions in the serotonin neurotransmitter system. However, the evidence for that idea, though plentiful, was indirect. In fact, a recent comprehensive analysis of existing studies concluded that … Continue reading Serotonin Deficiency Directly Linked With Depression in Groundbreaking Study