Following the August 2024 release of a U.S. government report linking higher levels of fluoride in drinking water to lower IQ in children, a new review conducted by the National Institutes of Health appears to confirm those findings.
The new analysis, published in JAMA Pediatrics on Monday, found that fluoride exposure exceeding 1.5 milligrams per liter (mg/L) was associated with reduced intelligence among children.
The study, conducted by the U.S. National Toxicology Program (NTP), took nine years to complete and is the largest meta-analysis to date on the health effects of fluoride.
The studies reviewed measured fluoride levels in drinking water and in urine. The authors used urinary fluoride as a proxy for total fluoride exposure….