A new review conducted by the National Institutes of Health (NIH) may have confirmed that higher levels of fluoride in drinking water lead to lower IQ scores in children.
The analysis, published in JAMA Pediatrics on Jan. 6, found that fluoride exposure exceeding 1.5 milligrams per liter (mg/L) was associated with reduced intelligence in children. The studies reviewed in the analysis measured fluoride levels in both drinking water and urine, with urinary fluoride serving as a proxy for total fluoride exposure.
