Backed by the medical research group Human Metabolome Technologies (HMT), researchers at Keio University have developed a test which measures the concentration of phosphoric acid in the blood as an indicator of depression. In a previous study, HMT made the connection between phosphoric acid and depression and found that those patients with depression have lower concentrations of ethanolamine phosphate. Researchers are able to use the blood test to diagnose patients with depression and have an 82 percent success rate.
