U.S. Government Report Links High Fluoride Levels in Drinking Water to Lower IQ in Children

A U.S. government report from the National Toxicology Program has found a potential link between higher fluoride levels in drinking water and lower IQ in children, The Associated Press reported.

Analyzing studies from multiple countries, the report indicates that fluoride concentrations exceeding 1.5 milligrams per liter are consistently associated with reduced IQ, suggesting a possible loss of 2 to 5 points in affected children. The report, released last week, did not address the effects of lower fluoride levels or impacts on adults, stating that further research is necessary.

Currently, about 1.9 million Americans are on water systems with fluoride levels above the recommended 1.5 milligrams. The American Dental Association is reviewing the report, which follows decades of fluoride use in water to prevent tooth decay. Despite its benefits, concerns about fluoride’s neurological effects have prompted calls for more research and potential policy discussions on fluoride labeling in beverages.