"Big Data" Sociology Masks the Neurotoxicity of Fluoride

In the high-stakes debate over water fluoridation, a new study by Warren et al., published in Science Advances (science.org), claims to settle the matter. Using a massive dataset of nearly 58,000 Americans, the authors conclude that exposure to fluoridated water is not only safe but provides a "modest" cognitive benefit of approximately 0.07 standard deviations in adolescence. That equates to 1 IQ point.