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Environ Health Perspect. 2007 April; 115(4): 643–647.
Published online 2007 January 9. doi: 10.1289/ehp.9270
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 children’s intelligence and growth.
Methods
We report the results of a study of 720 children between 8 and 12 years of age in rural villages in Shanyin county, Shanxi province, China. The children were exposed to As at concentrations of 142 ± 106 μg/L (medium-As group) and 190 ± 183 μg/L (high-As group) in drinking water compared with the control group that was exposed to low concentrations of As (2 ± 3 μg/L) and low concentrations of fluoride (0.5 ± 0.2 mg/L). A study group of children exposed to high concentrations of fluoride (8.3 ± 1.9 mg/L) but low concentrations of As (3 ± 3 μg/L) was also included because of the common occurrence of elevated concentrations of fluoride in groundwater in our study area. A standardized IQ (intelligence quotient) test was modified for children in rural China and was based on the classic Raven’s test used to determine the effects of these exposures on children’s intelligence. A standardized measurement procedure for weight, height, chest circumference, and lung capacity was used to determine the effects of these exposures on children’s growth.
Results
The mean IQ scores decreased from 105 ± 15 for the control group, to 101 ± 16 for the medium-As group (p < 0.05), and to 95 ± 17 for the high-As group (p < 0.01). The mean IQ score for the high-fluoride group was 101 ± 16 and significantly different from that of the control group (p < 0.05). Children in the control group were taller than those in the high-fluoride group (p < 0.05); weighed more than the those in the high-As group (p < 0.05); and had higher lung capacity than those in the medium-As group (p < 0.05).
Conclusions
Children’s intelligence and growth can be affected by high concentrations of As or fluoride. The IQ scores of the children in the high-As group were the lowest among the four groups we investigated. It is more significant that high concentrations of As affect children’s intelligence. It indicates that arsenic exposure can affect children’s intelligence and growth.
Originally posted by foood4thought
In this video.... Alex Jones says your IQ is reduced 10 to 20 points.... if you drink tap water in the United States..... He says the fluoride in the water causes your IQ to go down 10 to 20 points....
Originally posted by Swills
reply to post by foood4thought
Say what you will about Alex Jones but there are studies that exist that back up his claim. Check out my thread, Fluoride lowering childrens IQ?. TAlex Jones is sensational though, there is no doubt but he's not lying. Here's one example,
Originally posted by foood4thought
Originally posted by Swills
reply to post by foood4thought
Say what you will about Alex Jones but there are studies that exist that back up his claim. Check out my thread, Fluoride lowering childrens IQ?. TAlex Jones is sensational though, there is no doubt but he's not lying. Here's one example,
No... That's a study where they give waaaaaaaay more than 1 part per million.
We are not talking about swallowing tubes of toothpaste here...
The average fluoride concentration in the US..... is 1 part per million.... This causes NO IQ reduction.
The study you cited shows 8.3 parts per million..... OK....... And even that study did not show TWENTY POINT reduction......
OK...... Stop being misleading..... There is no IQ reduction from US tap water. Your study is not the same thing.edit on 3-5-2012 by foood4thought because: (no reason given)
Originally posted by Swills
That's just one study but proof enough that IQs were indeed lowered. The more you ingest the worst off you'll be. I totally already agreed he is sensational but he's not a liar. See for yourselves, it's clearly obvious you don't know these studies exist and didn't bother to see for yourself if Alex Jones is full of it or not....
/slow clap
edit on 3-5-2012 by Swills because: (no reason given)