Abstract
As part of a 2002-2003 investigation on the effects of high fluoride drinking water on IQ scores of children, serum fluoride (F) levels in the children were subjected to further study. Among the new findings, although IQ scores of boys and girls differed in the seven IQ level categories, there were no overall gender differences (boy/girl ratio 1.220 vs. 1.214 in the high and low F villages, respectively). However, the mean IQ was significantly higher and there were fewer children with an IQ less than 80 in the two quartiles with a serum fluoride level of less than 0.05 mg F/ L. Analysis of the overall relationship between IQ scores and serum F levels indicates there may be no serum F level below which adverse effects on IQ might not be present.
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Studies of relationships between the polymorphism of COMT gene and plasma proteomic profiling and children’s intelligence in high fluoride areas
Part I – Effect of high F drinking water on children’s IQ Objective: To investigate the relationships among the children’s serum F, urine F, thyroid hormone levels and children’s IQ in the high fluoride areas. Methods: We collected the samples of the drinking water, urine and blood and measured the F concentrations,
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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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Assessment of intelligence quotient among schoolchildren of fishermen community of Kutch, Gujarat, India
Background and aim: The aim of the study was to assess the intelligence quotient of fishermen schoolchildren of Kutch, Gujarat, India. Materials and methods: A descriptive cross-sectional study was conducted among 8 to 10 years old schoolchildren living in Kutch District, Gujarat, India, from January to February 2013. Seguin Form Board
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Developmental Fluoride Neurotoxicity: Choi et al. Respond
Sabour and Ghorbani’s comments about the reported mean difference in IQ (intelligence quotient) scores reported in our article (Choi et al. 2012) suggest a misunderstanding of the scale unit we used and the public health significance of even a small decrease in the average IQ associated with exposure. We appreciate
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Is Fluoride Potentially Neurotoxic?
An Editorial by David C. Bellinger, PhD, MSc Environmental epidemiology is a field replete with controversies, but the intensity of the debate inspired by the fluoridation of municipal water supplies to reduce dental caries is perhaps unrivaled. Governments, as well as individuals, differ in their assessments of water fluoridation as public policy.
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Fluoride Affects Learning & Memory in Animals
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Fluoride & IQ: 68 Studies
As of February 2021, a total of 76 studies have investigated the relationship between fluoride and human intelligence. Of these investigations, 68 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
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