A new study suggests a link between high levels of fluoride and lowered iq. It's heating up arguments over fluoridating drinking water, which dentists say is critical for. A new report linking fluoridated drinking water to lower iq scores in children is sure to ratchet up the debate over a practice thats considered one of the greatest public health. The results of a new federal analysis were drawn from studies conducted in other countries, where drinking water contains more fluoride than in the united states. For cwss that add fluoride, the us public health service recommends a fluoride concentration of 0. 7 mg/l, the us environmental protection agencys (epas) enforceable and.
The analysis behind that. A new report once again raises the question of whether there is a link between fluoride in drinking water and lower iq levels in children. The research, published in jama pediatrics on. New research hints at a link between higher fluoride exposure and reduced iq in children, reviving a lingering debate over water fluoridation. When they restricted their analysis to the four studies with the lowest risk of bias in their data, they found that children drinking water with 2 parts per million of fluoride had iq. The analysis of 31 studies shows that fluoride levels of up to 4 mg/l and 2 mg/l in drinking water are linked with lower iq scores in children, with an average drop of about 2. 25 iq points. There was no such statistical association when the water fluoride levels were up to 1. 5.
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