Abstract of new IQ study from Iran

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An IQ study of children in communities with 2.38 ppm fluoride in their water vs. those with 0.41 ppm fluoride.

High fluoride exposure in drinking water: Effect on children's IQ, one new report. By Poureslami HR, et al. 2011. International Journal of Paediatric Dentistry 21(Suppl s1):47. (See Page 47, Abstract #O15-134)

Aim: We investigated the effect of chronic high fluoride (F) exposure on children‘s intelligence.
Design: In this cross sectional study two urban communities with similar socio-economic and cultural status but with different levels of F in drinking water, in the Kerman province, were studied: Koohbanan city (F 2.38 mg/L), Baft city (F 0.41 mg/L). Study samples consisted of 119 children 6–9 years old: 59 children from Koohbanan and 60 children from Baft. The Raven‘s test used to determine the effect of F exposures on children‘s IQ.
Results: In the low F area (control group) the mean IQ score of children was 97.80 ± 15.95 that decreased to 91.37 ± 15.63 for the high F group (Koohbanan‘s children), which was significantly different from the control group (P < 0.05).
Conclusion: Based on the findings, the chronic exposure to high levels of F can be one of the factors that influence intellectual development.

IQ Studies: See the 24 published studies reporting an association of reduced IQ with high fluoride exposure. The water fluoride levels in these studies range from 0.88 - 9.4 ppm. Brain Studies: • Fluoride is listed in EPA's Database of Developmental Neurotoxicants as a chemical "with Substantial Evidence of Developmental Neurotoxicity (n≈100)" • See list of fluoride brain studies up to Summer 2010 • See list of fluoride brain studies since the publication of the National Research Council of the National Academies Report of 2006

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