A major peer reviewed study published on September 19 in the US Government’s Environmental Health Perspectives has found that children born to mothers exposed to fluoride while pregnant, have significantly lower IQ scores.
The study measured fluoride in urine and found the average level of fluoride in urine was 0.9mg/L (mg/L = parts per million). This roughly equates to urine levels found in women drinking fluoridated water at concentrations of 0.5 – 1.5 mg/L.
This study was very carefully done by a group of researchers who have produced over 50 papers on the cognitive health of children in relationship to environmental exposures. It was funded by the US National Institutes of Health and was a multi-million dollar study. This was the group’s first study of fluoride – their other studies mostly dealing with lead, mercury and other environmental neurotoxicants.
This study controlled for a wide range of potential factors that might have skewed the results and produced a false effect. It was able to largely rule out confounding effects by these other factors. The factors ruled out included lead, mercury, socio-economic status, smoking, alcohol use, and health problems during pregnancy.
This study offers confirmation of previous studies in Mexico, China and elsewhere.