"The NTP monograph concluded, with moderate confidence, that higher levels of fluoride exposure, such as drinking water containing more than 1.5 milligrams of fluoride per liter, are associated with lower IQ in children".
They found drinking water with levels that lowered IQ. The actual conclusion was that higher levels (that were found in drinking water) lower IQ.
For lower levels the conclusion is we don't know how it effects IQ. The actual bold face conclusion is "More research is needed to better understand if there are health risks associated with low fluoride exposures".
They found drinking water with levels that lowered IQ. The actual conclusion was that higher levels (that were found in drinking water) lower IQ.
For lower levels the conclusion is we don't know how it effects IQ. The actual bold face conclusion is "More research is needed to better understand if there are health risks associated with low fluoride exposures".