Dr. Grant, who chairs a committee of the American Psychological Association that develops guidance for psychologists and the public on device and social-media use, explained that being saturated with negative content can alter the brain’s chemistry, displacing feel-good neurotransmitters with stress hormones. “What happens is adrenaline and cortisol flood your brain, and dopamine and serotonin leave the building,” he said. https://www.wsj.com/amp/a.. #mindful.technology