"Fluoride exposure is consistently linked with lowered IQ, according to a landmark analysis of more than 70 published studies on the subject.
The paper, published January 6 in the journal JAMA Pediatrics and authored by scientists with the National Institutes of Health, found a significant inverse relationship between measures of fluoride exposure and IQ in 64 of 74 studies.
The study, the largest meta-analysis of its kind, found that those exposed to high levels of fluoride have measurably lower IQs, equivalent to a difference of nearly 7 IQ points, compared to those in the low fluoride groups. This conclusion came from 59 studies. Most, but not all, of these examined people who live in areas with naturally-occurring levels of fluoride higher than that used in fluoridation.
Importantly, however, the paper found the link between fluoride and IQ loss persisted even at low levels of fluoride, as measured in human urine samples."
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