The Folly of Investigating Fluoride Toothpaste
Your editorial 'The Fluoride Toothpaste Conspiracy' (May 15) is on target. Allow me to go even further. The 2024 National Toxicology Program study that has helped fuel Texas Attorney General Ken Paxton's investigation is highly flawed. It is based on its review of 19 reports, none of which were conducted in the U.S. Ten were from China, three from India and Mexico, two from Canada and one from Iran.
IQ studies aren't perfect without reliable outcomes, and IQ studies in young children are less reliable and difficult to measure. Even so, the study's conclusion was that there was 'moderate confidence' that fluoride exposure in drinking water above 1.5 milligrams per liter (mg/L) leads to negative effects among children. No effect was noted in adults. The World Health Organization's guideline is 1.5 mg/L, and the U.S.'s is 0.7 mg/L. The results are thus of limited relevance in the U.S anyway.
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