Study Finds Mitochondrial “Energy Switch” May Separate Drug Reward From Natural Pleasure | #mitochondrial calcium uniporter # MCU # addiction research # drug addiction # dopamine release # mitochondrial calcium # brain reward system # natural reward # drug reward # opioids # heroin # morphine # fentanyl # methamphetamine # nucleus accumbens # neuroscience # addiction treatment research # mitochondrial energy # dopamine signaling