Note from Fluoride Action Network:
This is the same study that was published by the journal Journal of Dentistry and Oral Hygiene in 2011.
A study was conducted to evaluate the effect of high and low fluoride (F) in
the drinking water on the Intelligence Quotient (IQ) of young schoolchildren in two
otherwise similar high-altitude communities in a mountainous region of Kerman Province,
Iran. The study sample consisted of 120 boys and girls age 7–9: 60 in the city of
Koohbanan (pop. 12,253; elev. 2200 m) with 2.38 ppm F in the water and 60 in the city of
Baft (pop. 14,628; elev. 2300 m) with 0.41 ppm F in the water. Using a Persian version of
Raven’s Progressive Matrices Intelligence Test, the mean IQ scores of the children in low
F Baft was 97.80±15.95, and in high F Koohbanan it was significantly lower at 91.37±15.63
(p = 0.028).
Effect of fluoride exposure on intelligence quotient (IQ) among 13-15 year old school children of known endemic area of fluorosis, Nalagonda District, Andhra Pradesh
Background: Waning controversy over fluoride and water fluoridation is rekindling with the findings released from certain fluoride studies which reported an inverse association between fluoride exposure and intelligence. Objective: To assess the relationship between exposure to different drinking water fluoride levels and children's Intelligence Quotient (IQ) among 13-15 year old school
Effect of fluoride exposure on the intelligence of school children in Madhya Pradesh, India.
Objective: To assess the relationship between exposure to different drinking water fluoride levels and children's intelligence in Madhya Pradesh state, India. Materials and Methods: This cross-sectional study was conducted among 12-year-old school children of Madhya Pradesh state, India. The children were selected from low (< 1.5 parts per million) and high
Research on the intellectual development of children in high fluoride areas.
As measured by the rural version of the Chinese Standardized Raven Test, the average IQ of 320 children conceived and raised in the village of Biji, Linyi County, Shanxi Province, with 4.55 mg F/L in the drinking water, was 100.24±14.52. The average IQ of the same number of children conceived
Developmental fluoride neurotoxicity: an updated review.
Background After the discovery of fluoride as a caries-preventing agent in the mid-twentieth century, fluoridation of community water has become a widespread intervention, sometimes hailed as a mainstay of modern public health. However, this practice results in elevated fluoride intake and has become controversial for two reasons. First, topical fluoride application
Early Life Exposure in Mexico to ENvironmental Toxicants (ELEMENT) Project.
PURPOSE: The Early Life Exposure in Mexico to ENvironmental Toxicants (ELEMENT) Project is a mother-child pregnancy and birth cohort originally initiated in the mid-1990s to explore: (1) whether enhanced mobilisation of lead from maternal bone stores during pregnancy poses a risk to fetal and subsequent offspring neurodevelopment; and (2) whether
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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
Fluoride & IQ: The 65 Studies
As of May 2020, a total of 73 studies have investigated the relationship between fluoride and human intelligence. Of these investigations, 65 studies have found that elevated fluoride exposure is associated with reduced IQ in humans, while over 60 animal studies have found that fluoride exposure impairs the learning and/or
Fluoride's Direct Effects on Brain: Animal Studies
The possibility that fluoride ingestion may impair intelligence and other indices of neurological function is supported by a vast body of animal research, including over 40 studies that have investigated fluoride's effects on brain quality in animals. As discussed by the National Research Council, the studies have consistently demonstrated that fluoride, at widely varying concentrations, is toxic to the brain.
NRC (2006): Fluoride's Neurotoxicity and Neurobehavioral Effects
The NRC's analysis on fluoride and the brain.
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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