Abstract
Wechsler Intelligence Test IQ scores of 160 children, 8–14 years old, from nine schools in an area of high fluoride and low iodine averaged 64.8 compared with 85.0 (p<0.01) for 169 children of the same ages from seven schools in an area with low iodine only. Among the first group 65 (40.6%) had IQs below 60, but only 23 (13.6%) among the second group had scores this low. In each group the IQs of the boys and girls did not differ significantly. Clearly, exposure to the combination of high fluoride and low iodine was more deleterious than to low iodine alone.
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Research on the effects of fluoride on child intellectual development under different environments
Goal: To study the effects of the fluoride and iodine content of drinking water on child intellectual development and the interaction between the two factors and also the relationship of educational factors to such development. Methods: The subjects of the investigation were 8- to 14-year-old children randomly selected from endemic areas as well
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Arsenic and fluoride exposure in drinking water: children’s IQ and growth in Shanyin County, Shanxi Province, China.
Background: Recently, in a cross-sectional study of 201 children in Araihazar, Bangladesh, exposure to arsenic (As) in drinking water has been shown to lower the scores on tests that measure children’s intellectual function before and after adjustment for sociodemographic features. Objectives: We investigated the effects of As and fluoride exposure on
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Decreased intelligence in children and exposure to fluoride and arsenic in drinking water.
Recent evidence suggests that fluoride (F) and arsenic (As) may adversely affect intelligence quotient (IQ) scores. We explore the association between exposure to F and As in drinking water and intelligence in children. Three rural communities in Mexico with contrasting levels of F and As in drinking water were studied:
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Effects of high fluoride and low iodine on biochemical indexes of the brain and learning-memory of offspring rats
SUMMARY: Thirty-two Wistar rats were divided randomly into four groups of eight rats each (female:male = 3:1). With one untreated group as a control group, the other three groups were administered, respectively, high fluoride in their drinking water (100 mg F/L from NaF), low iodine in their chow (0.0855 mg/kg),
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Level of fluoride and arsenic in household shallow well water in Wamiao and Xinhuai villages in Jiangsu Province, China
After previously excluding iodine and lead as confounding factors, the aim of the present study, conducted in June 2013, was to consider whether arsenic was a confounding factor in the studies of children’s intelligence in Wamiao and Xinhuai. Fluoride and arsenic levels were measured in water samples from the 37
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Fluoride Affects Learning & Memory in Animals
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Fluoride & IQ: 68 Studies
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Fluoride, Water Hardness, and Endemic Goitre
Variations in goitre prevalence were found to correlate closely with the fluoride content (p=0-74; P<0-01) and with the hardness (p=0.77; P<0-01) of the water in each village. The effects of fluoride and water hardness seem to be independent.
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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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The Relationship Between Fluoride Exposure & Goitre in South Africa
As a general rule simple goitre, irrespective of the cause, can be very, or fairly, satisfactorily combated by an adequate increase in man's daily iodine intake, except when the enlargement of the gland is due to the ingestion of excessive amounts of fluorine. The only correct solution to fluorine-induced endemic goitre is the removal of this element from the drinking water.
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