Fact: Recent studies conducted in China, Mexico and India have raised questions about the potential effects of high levels of fluoride on intelligence and behavior.
However, these studies were poorly designed, gathered unreliable data and were
not peer-reviewed by independent scientists.
Foreign studies cited involved fluoride levels that were at least double or triple the level used to fluoridate drinking water in the U.S. It is irresponsible to claim these studies have any real meaning for our situation in the U.S.
Researchers who evaluated these studies also pointed out that the lower IQs could be traced to other factors, such as arsenic exposure, the burning of high-fluoride coal inside homes and the eating of contaminated grain.
Source: fluoridescience.org and ilikemyteeth.org.