Abstract
Children, aged 9–10½, from 22 villages in Jing County, Hubei Province, China, with different levels of fluoride in the drinking water were tested for their IQs according to the revised version of Raven’s Standard Progressive Matrices. Among 141 children in villages with 2.1–4.0 ppm F in the drinking water, 34 (24.11%) had IQ scores in the top three categories (1–3) of intelligence; among 147 children in the villages with 0.1–0.2 ppm F, the number was 40 (27.21%), and among 159 children in villages with a “normal” 0.5–1.0 ppm F, the number was 92 (57.86%). For the lowest two IQ categories (4 and 5), the percentages were, respectively, 75.89, 72.79, and 42.14%. The reasons for this non-monotonic pattern are not clear.
Translated by Julian Brooke for the Fluoride Action Network and published with the concurrence of the Chinese Journal of Control of Endemic Diseases 1990;5(4):203-4 in the journal Fluoride.
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Analysis on TSH and intelligence level of children with dental fluorosis in a high fluoride area.
Fluoride is one of the indispensable elements for the living being. Excess amounts of fluoride, however, may damage the teeth and bones. Fluoride may also injure the body’s soft tissues, resulting in nonskeletal fluorosis. To further investigate the influence of endemic fluorosis on childhood thyroid function and intelligence, we have selected school-aged children inflicted with dental fluorosis
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Effect of fluoride in drinking water on dental caries and IQ in children.
The aim of this work was to evaluate the impact of fluoride exposure on the prevalence of dental caries and the intellectual ability of children. Method: In this cross-sectional study, 161 children from 9 to 10 years of age were evaluated. The concentration of fluoride in drinking water and urine was
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European Commission: Opinions on the 2011 SCHER report on fluoridation for the Layman
European Commission: Opinions on the 2011 SCHER report on fluoridation for the Layman About this publication on Fluoridation Online at https://ec.europa.eu/health/scientific_committees/opinions_layman/fluoridation/en/about.htm 1. Source for this Publication The texts in level 3 are directly sourced from “Critical review of any new evidence on the hazard profile, health effects, and human exposure to fluoride and the fluoridating
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OP V – 2 Prenatal fluoride exposure and neurobehavior among children 1–3 years of age in Mexico
Background/aim Recent studies report an inverse association between fluoride (F) exposure and IQ in children, but few included individual measures of exposure or assessed associations with prenatal exposure using a prospective study design. Methods This study utilised the Early Life Exposures in Mexico to Environmental Toxicants (ELEMENT) birth cohort and archived pregnancy samples
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Fluoride exposure and hypothyroidism in a Canadian pregnancy cohort.
Highlights • Fluoride may disrupt thyroid function. • Thyroid dysfunction in pregnancy can adversely impact offspring development. • Fluoride in water increased risk of hypothyroidism in pregnant women. • Boys had lower IQ scores if their mothers were hypothyroid in pregnancy. • Thyroid disruption may contribute to developmental neurotoxicity of
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Fluoride & IQ: 76 Studies
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Fluoride Affects Learning & Memory in Animals
An association between elevated fluoride exposure and reduced intelligence has now been observed in 65 IQ studies. Although a link between fluoride and intelligence might initially seem surprising or random, it is actually consistent with a large body of animal research. This animal research includes the following 45 studies (out
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Fluoride: Developmental Neurotoxicity.
Developmental Neurotoxicity There has been a tremendous amount of research done on the association of exposure to fluoride with developmental neurotoxicity. There are over 60 studies reporting reduced IQ in children and several on the impaired learning/memory in animals. And there are studies which link fluoride to Attention Deficit Hyperactivity Disorder. Teaching
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Fluoride's Effect on Fetal Brain
The human placenta does not prevent the passage of fluoride from a pregnant mother's bloodstream to the fetus. As a result, a fetus can be harmed by fluoride ingested pregnancy. Based on research from China, the fetal brain is one of the organs susceptible to fluoride poisoning. As highlighted by the excerpts
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NRC (2006): Fluoride's Neurotoxicity and Neurobehavioral Effects
The NRC's analysis on fluoride and the brain.
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