Abstract
Objective: To understand the relationship of dental fluorosis and IQ among children in a high fluoride area and further study the harm of high fluoride to the human body.
Method: High fluoride areas (from drinking water) in Qi County were selected as the site of investigation. The subjects of the study were 7-to-10-year-old children. Dental fluorosis was diagnosed using the Dean Index, and IQ was determined with the Chinese combined Raven’s test.
Results: The average IQ among the children in the high fluoride area was 98.06 and the rate of mental retardation was 5.47%. Intelligence distribution in the children with and without dental fluorosis did not show any difference, and no sex-specific differences in intelligence were found.
Conclusions: The long-term consumption of high fluoride water may adversely affect children’s intelligence.
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The relationships between thyroid-stimulating hormone and/or dopamine levels in peripheral blood and IQ in children with different urinary iodine concentrations.
Highlights TSH is not related IQ in children with different urinary iodine concentrations. Dopamine in plasma is unrelated to IQ in children with adequate or excessive iodine. Dopamine has positive correlation with intelligence in iodine deficiency group. The interaction between dopamine in plasma and TSH is not related to
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Assessment of groundwater quality with special reference to fluoride and its impact on IQ of schoolchildren in six villages of the Mundra Region, Kachchh, Gujarat, India
Sixty groundwater (GW) samples from bore and dug wells averaging 560 feet deep were collected from the six villages of Baroi, Chhasara, Gundala, Mundra, Pragpar, and Zarpara in the semi-arid Mundra region of Kachchh, Gujarat, India. The mean temperature of the GW collection samples was 32.11oC, and the average slightly
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Report on the intellectual ability of children living in high-fluoride water areas
Note from Fluoride Action Network: This is a duplicate study of Lu et al. (2000). SUMMARY: Sixty children, aged 10 to 12, were randomly selected for IQ testing from an area with high fluoride (3.15 mg F/L) in the drinking water along with 58 control children of the same age from a nearby low fluoride
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Controversy: The Evolving Science of Fluoride: When New Evidence Doesn't Conform With Existing Beliefs
Over the past 75 years, health authorities have declared that community water fluoridation-a practice that reaches over 400 million worldwide-is safe. Yet, studies conducted in North America examining the safety of fluoride exposure in pregnancy were nonexistent. When a Canadian study reported that higher fluoride exposure in pregnant women was
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Association between water fluoride and the level of children's intelligence: a dose–response meta-analysis
Highlights High fluoride content in drinking water could affect the intellectual development of children. High water fluoride exposure is significantly associated with a reduced level of intelligence. Water quality and water fluoride exposure should be improved in areas with high water fluoride content. Objectives: Higher fluoride concentrations in water have inconsistently
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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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