Fluoride has been added to community drinking water systems in the United States since 1945 to prevent dental cavities. Currently, 73% of the U.S. population receives fluoridated water at a targeted concentration of 0.7 milligrams per liter. However, a new study suggests that prenatal fluoride exposure at these levels may increase the risk of neurobehavioral problems in children. The research, published in JAMA Network Open, found that a 0.68 milligram per liter increase in fluoride exposure during pregnancy was associated with nearly double the chance of a child exhibiting neurobehavioral iss…