New blood, urine tests find 5 distinct types of depression, researcher says | Fox News: A researcher says he has identified multiple types of depression, including three that don't involve serotonin. And he says all can easily be diagnosed with blood or urine tests.
Most psychiatrists believe that depression is caused by low levels of the chemical serotonin. This is why the treatment for depression is often selective serotonin reuptake inhibitors (SSRIs), which boost serotonin levels in the brain.
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But a new study suggests that there are at least five biotypes of clinical depression. William J. Walsh, Ph.D., president of the Walsh Research Institute, and his team looked at about 300,000 blood and urine chemistry test results and 200,000 medical history factors from approximately 2,800 patients diagnosed with depression. They found that five major depression biotypes represented about 95 percent of the patients.
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