Experts Confirm Extremely Low Levels of Fluoride Reduce IQ Analysis by Stuart Cooper, Campaign Director, Fluoride Action Network via Mercola
GNN Note – We stopped using water from the tap – city water – for cooking, drinking and making tea / coffee. HUGE difference in our overall health and, especially, our mental faculties. If you’re still using tap water / city water try using for the toilet, shower and brushing your teeth and see how it impacts your life. /END
A landmark study by Grandjean, et al.,1 has been published confirming that very low levels of fluoride exposure during pregnancy impair the brain development of the child and at a population level may be causing more damage than lead, mercury or arsenic.
The study found that a maternal urine fluoride concentration of 0.2 mg/L, which is exceeded four to five times in pregnant women living in fluoridated communities, was enough to lower IQ by one point. The authors stated that even this impact is likely underestimated and:
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“These findings provide additional evidence that fluoride is a developmental neurotoxicant … and the benchmark results should inspire a revision of water-fluoride recommendations aimed at protecting pregnant women and young children.”
A urinary fluoride (UF) concentration of 0.2 mg/L is far below what a pregnant woman in a fluoridated community would have, as confirmed by two recent studies.
A study of pregnant women in fluoridated San Francisco, California,2 found a mean UF concentration of 0.74 mg/L, and one with participants in fluoridated communities across Canada3 found a mean UF concentration of 1.06 mg/L. Both levels were significantly higher than those found in women in nonfluoridated communities.
Grandjean, et al.’s study, published in Risk Analysis, was a benchmark dose (BMD) analysis of the pooled data from the National Institutes of Health (NIH) funded ELEMENT and MIREC birth cohorts in Mexico and Canada. These are the birth cohorts that were used in the studies that found exposure to low levels of fluoride during pregnancy is linked to cognitive impairment in children.4,5,6,7
A Benchmark Dose is used to identify a dose or concentration that would likely cause a defined amount of harm, in this case a loss of one IQ point.
What makes this paper so important is that BMD is part of the U.S. Environmental Protection Agency’s (EPA) risk assessment methodology, and the paper’s authors used a one IQ point drop as the adverse effect amount because the EPA has used this same level of IQ loss in their own risk assessments and has recommended use of such a level.
It has been well established that a loss of one IQ point leads to a reduced lifetime earning ability of $18,000. Summed over the whole population we are talking about a loss of billions of dollars of earning ability each year.
It is estimated that over 72% of public drinking water systems in America are fluoridated; thus, millions of pregnant women are currently being exposed to levels of fluoride that have the potential to lower their children’s IQ by at least four points and probably more.
Moreover, it’s important to point out that in risk assessments using BMD methodology, it’s standard practice to apply a safety factor on top of the calculated BMD in order to determine a safe reference dose (RfD) to protect the whole population (including the most vulnerable) from harm.
