US Govt. Study Links High Fluoride Consumption to Lower Childhood IQ
The Facts
A recent report from the US government has found, "with moderate confidence," a link between children consuming higher-than-recommended levels of fluoride and lower intelligence quotient (IQ).
The addition of low levels of fluoride to drinking water has long been considered by many to be a public health accomplishment, as fluoride helps to strengthen teeth and prevent cavities according to the Centers for Disease Control and Prevention.
The Spin
Narrative A
Several international studies on pregnant women, infants, and children exposed to fluoride levels over 1.5 mg per liter of drinking water revealed lower IQs. While additional research may be needed to better understand the potential risks linked to low levels of fluoride exposure, some caution and concern are warranted around current regulation surrounding the fluoridation of water.
Narrative B
The US has accumulated 50 years of data demonstrating the positive effects of fluoride. Often, foreign research papers exhibit significant bias, or use inadequate sample sizes. The locations are also different, and the results don't necessarily extend to the American context. There are numerous safeguards in US water systems to prevent excessive quantities of fluoride. Concern is unwarranted.