Abstract

As an additional part of our investigation of an association between fluoride in drinking water and children’s intelligence in two villages of Sihong County, Jiangsu Province, China, we have now determined blood lead levels of children in that study.

Blood samples (80 ?L) were collected on June 18 and 19, 2003 from the index finger of 71 randomly selected 8 to 13 year-old children in the high fluoride village of Wamiao and 67 children of the same ages in the low fluoride village of Xinhuai. The samples were preserved in clean plastic centrifuge tubes containing 0.64 mL of Triton X-100. Blood lead was measured within one week by atomic absorption spectrophotometry.

The results, as summarized in the table below, show there is essentially no difference between the two villages in blood lead concentrations of the children… See pdf for full Letter

SEE the IQ study by these authors: Effect of fluoride in drinking water on children’s intelligence

• Related Studies :

  • A Systems Approach to Remediating Human Exposure to Arsenic and Fluoride From Overexploited Aquifers.

    Key Points Overexploiting aquifers increases energy costs and lowers economic productivity by increasing human exposure to geogenic neurotoxins Over a 100 year future time-frame estimated revenue from agro-export will be less than the costs this activity imposes on the population Investing in water treatment substantially lowers costs of deteriorating water quality In

  • Using drawing tests to measure intelligence in children from areas impacted by combined Al-F endemic toxicosis (Shuicheng, Guizhou).

    Measurements of intelligence via drawing tests have been conducted to examine the intelligence development of children from regions affected by combined AIF endemic toxicosis. A selected number of 196 children between 6.5 and 12 years of age participated in the testing. Across all age groups, the average IQ level of children from

  • WITHDRAWN: Co-exposure effects of arsenic and fluoride on intelligence and oxidative stress in school-aged children: a cohort study.

    This article has been withdrawn at the request of the editor. The Publisher apologizes for any inconvenience this may cause. as of November 6, 2020 Highlights Pioneer biomonitoring study on rural children to address As and F- co-exposure. High dental Fluorosis found in relation to urinary As and F- levels in

  • Arsenic and fluoride co-exposure through drinking water and their impacts on intelligence and oxidative stress among rural school-aged children of Lahore and Kasur districts, Pakistan.

    Arsenic (As), and fluoride (F-) are potent contaminants with established carcinogenic and non-carcinogenic impacts on the exposed populations globally. Despite elevated groundwater As and F- levels being reported from various regions of Pakistan no biomonitoring study has been reported yet to address the co-exposure impact of As and F- among

  • 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

• Related FAN Content :

  • Fluoride & IQ: 76 Studies

    Note: See the Updated list of fluoride IQ studies at https://fluoridealert.org/researchers/fluoride-iq-studies/the-fluoride-iq-studies/ • As of July 18, 2022, a total of 85 human studies have investigated the relationship between fluoride and human intelligence. • Of these investigations, 76 studies have reported that elevated fluoride exposure is associated with reduced IQ in humans. • The studies

  • 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

  • Fluoridation, Dialysis & Osteomalacia

    In the 1960s and 1970s, doctors discovered that patients receiving kidney dialysis were accumulating very high levels of fluoride in their bones and blood, and that this exposure was associated with severe forms of osteomalacia, a bone-softening disease that leads to weak bones and often excruciating bone pain. Based on

  • Skeletal Fluorosis & Individual Variability

    One of the common fallacies in the research on skeletal fluorosis is the notion that there is a uniform level of fluoride that is safe for everyone in the population. These "safety thresholds" have been expressed in terms of (a) bone fluoride content, (b) daily dose, (c) water fluoride level, (d) urinary fluoride level, and (e) blood fluoride level. The central fallacy with each of these alleged safety thresholds, however, is that they ignore the wide range of individual susceptibility in how people respond to toxic substances, including fluoride.

  • 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