A rigorous nine-year research review looking at the relationship between fluoride and intelligence in children concludes that as fluoride levels rise, IQ drops. Every 1 part per million increase ...

An analysis of more than 70 studies on fluoride and IQ levels concluded there was a relationship between higher levels of the common water additive and lower IQ levels in children, though a large ...

On a national level, the average IQ in the United States is reported to be 98. See where Florida ranks, ... That's considered average intelligence, according to most IQ scales.