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Maybe thats why Portlanders are SOOOOOO politically active and aware...
but the simple fact is, the study doesn't refute my assertions.
This is amazing. I know that fluoride interacts with the pineal gland to cause problems -
Apparently you miss the point of it.
I read your signature, quite scary. At least you are at the point where you know yourself what is scientific.
...In 2006, we did a systematic review and identified five industrial chemicals as developmental neurotoxicants: lead, methylmercury, polychlorinated biphenyls, arsenic, and toluene. Since 2006, epidemiological studies have documented six additional developmental neurotoxicants—manganese, fluoride, chlorpyrifos, dichlorodiphenyltrichloroethane, tetrachloroethylene, and the polybrominated diphenyl ethers. We postulate that even more neurotoxicants remain undiscovered. To control the pandemic of developmental neurotoxicity, we propose a global prevention strategy. Untested chemicals should not be presumed to be safe to brain development, and chemicals in existing use and all new chemicals must therefore be tested for developmental neurotoxicity. To coordinate these efforts and to accelerate translation of science into prevention, we propose the urgent formation of a new international clearinghouse.
Actually that batch of 27 Chinese studies is quite flawed, many not accounting for things like lead and mercury contamination.
Phage
reply to post by sheepslayer247
Actually that batch of 27 Chinese studies is quite flawed, many not accounting for things like lead and mercury contamination.
But a big problem I see with these sorts of studies is that IQ scores can vary quite a bit because of various factors and those factors can be regional in nature. To see what I mean, here is a chart of estimated IQ scores by state for the US.
www-958.ibm.com...
Here's a study that takes a more careful approach to come to similar results:
State IQ
First notice that the range is quite narrow, only 8.3 points from highest to lowest and well within the average range. Not really significant yet that metastudy argues that a 7 point difference is meaningful.
But let's assume that fluoride does affect intelligence. This means that states with a high level of fluoridation should have a lower IQ rating.
The only water supplies with fluoride in Hawaii are on military bases so Hawaii should have a high IQ level, right? Nope right near the bottom.
Let's look at the state with the lowest IQ, Mississippi. Here are the population statistics:
No fluoride: 388,654
0.1-0.3 mg/l: 689,885
Out of a population of 3,128,344 served, 66% have high(ish) levels of fluoride in their drinking water.
Now, how about the state with the highest IQ, Massachusetts:
No fluoride: 1,963,435
0.05-0.3 mg/l: 627,420
Out of a population of 11,275,825 served, 75% have high(ish) levels of fluoride in their drinking water.
See any correlation? I don't. But these are estimated IQ levels but if nothing else it is apparent that there are (at least in the US) regional differences in IQ and they don't seem to be correlated with fluoridated water. Maybe something other than fluoride is at play. Some factor(s) that just could be very difficult to control for.
Oh, the fluoridation statistics can be found here. The fluoridation levels are a combination of natural and artificial.
apps.nccd.cdc.gov...edit on 3/11/2014 by Phage because: (no reason given)
i am curious but what makes the study you are quoting any more relevant than the one you are disputing?
To attribute slight statistical differences in IQ to fluoride in drinking water doesn't seem to be a valid approach.
Really? Are you sure? Have you looked?
No study has ever proven that ingesting fluoride by drinking it helps prevent cavities in any way,
While 6-year-old children who had not ingested fluoridated water showed higher dft in the WF-ceased area than in the non-WF area, 11-year-old children in the WF-ceased area who had ingested fluoridated water for approximately 4 years after birth showed significantly lower DMFT than those in the non-WF area. This suggests that the systemic effect of fluoride intake through water fluoridation could be important for the prevention of dental caries.
In this nationally representative sample of Australian adults, caries-preventive effects of water fluoridation were at least as great in adults born before widespread implementation of fluoridation as after widespread implementation of fluoridation.
Conclusion: Dental caries prevalence decreased as the fluoride concentration in the water increased. Thus negative association was seen between dental caries and water fluoride levels.
jdr.sagepub.com...
The prevented fraction for water fluoridation was 27% (95%CI: 19%–34%). These findings suggest that fluoride prevents caries among adults of all ages.