sábado, 2 de febrero de 2013

Estudios indican que el floruro reduce el QI y causa otros problemas en la salud



Government and Top University Studies: Fluoride Lowers IQ and Causes Other Health Problems

Dentists Haven’t Read the Studies
Preface: This post doesn’t discuss any conspiracy theories.  It simply presents a scientific review of the studies by mainstream sources on fluoride.
World Health Organization Data (2004) 
Tooth Decay Trends (12 year olds) in Fluoridated vs. Unfluoridated Countries: 

Government and Top University Studies: Fluoride Lowers IQ and Causes Other Health Problems who dmft

And even though the scientific literature shows that – when fluoridation of water supplies is stopped – cavities do not increase (but may in some cases actually decrease)? See thisthisthisthisthis and this.
And even though many prominent leaders of the pro-water fluoridation movement have recently admitted publicly that they were wrong? That includes:
  • John Colquhoun, DDS, Principal Dental Officer for Auckland, New Zealand and chair of that country’s Fluoridation Promotion Committee, reviewed New Zealand’s dental statistics in an effort to convince skeptics that fluoridation was beneficial and found that tooth decay rates were the same in fluoridated and nonfluoridated places, which prompted him to re-examine the classic fluoridation studies. He withdrew his support for it in “Why I Changed my Mind About Water Fluoridation” (Perspectives in Biology and Medicine 1997;41:29—44).
  • Richard G. Foulkes, MD, a health care administrator and former assistant professor in the Department of Health Care and Epidemiology at the University of British Columbia also switched from pro to anti-water fluoridation after studying the issue.
As Time Magazine notes:
What has also changed is how much toxicologists know about the harmful effects of fluoride compounds. Ingested in high doses, fluoride is indisputably toxic; it was once commonly used in rat poison. Hydrogen fluoride is regulated as a hazardous pollutant in emissions from chemical plants and has been linked to respiratory illness. Even in toothpaste, sodium fluoride is a health concern. In 1997 the Food and Drug Administration toughened the warning on every tube to read, “If more than used for brushing is accidentally swallowed, get medical help or contact a poison-control center right away.”
Because of what they were taught in school:
I contacted [a] dentist friend of mine, Dr. Susan Rubin, to find out what she recommends.Like most dentists, she was taught in dental school that fluoride saves teeth, and it never occurred to her to question that (even after her patients started bringing it up) until her own daughter came down with thyroid problems. Oh yeah, fluoride can affect that, too. She did her own research and was alarmed at what she found. She tried to get her town to stop putting fluoride in her water, but they refused.
And because dentists have no idea that the type of fluoride added to water supplies is a dangerous, unapproved variety.
In other words, dentists are well-meaning … but uninformed.
In reality, a United States National Academy of Science report, a Harvard meta-review of 27 studies, and many other government and university studies show that fluoride lowers IQ and causes a variety of other serious health problems.
The Harvard School for Public Health reports:
For years health experts have been unable to agree on whether fluoride in the drinking water may be toxic to the developing human brain. Extremely high levels of fluoride are known to cause neurotoxicity in adults, and negative impacts on memory and learning have been reported in rodent studies, but little is known about the substance’s impact on children’s neurodevelopment. In a meta-analysis, researchers from Harvard School of Public Health (HSPH) and China Medical University in Shenyang for the first time combined 27 studies and found strong indications that fluoride may adversely affect cognitive development in children. Based on the findings, the authors say that this risk should not be ignored, and that more research on fluoride’s impact on the developing brain is warranted.
The study [click for abstract] was published online in Environmental Health Perspectiveson July 20, 2012.
Environmental Health Perspectives is a publication of the United States National Institutes of Health’sNational Institute of Environmental Health Sciences.
Harvard’s announcement continues:
The researchers conducted a systematic review of studies…. Anna Choi,  research scientist in the Department of Environmental Health at HSPH [and] Philippe Grandjean, adjunct professor of environmental health at HSPH, and their colleagues collated the epidemiological studies of children exposed to fluoride from drinking water. The China National Knowledge Infrastructure database also was included to locate studies published in Chinese journals. They then analyzed possible associations with IQ measures in more than 8,000 children of school age; all but one study suggested that high fluoride content in water may negatively affect cognitive development.
The average loss was only half of one IQ point, but some studies suggested that even slightly increased fluoride exposure could be toxic to the brain. Thus,children in high-fluoride areas had significantly lower IQ scores than those who lived in low-fluoride areas. The children studied were up to 14 years of age, but the investigators speculate that any toxic effect on brain development may have happened earlier, and that the brain may not be fully capable of compensating for the toxicity.
Fluoride seems to fit in with lead, mercury, and other poisons that cause chemical brain drain,” Grandjean says. “The effect of each toxicant may seem small, but the combined damage on a population scale can be serious, especially because the brain power of the next generation is crucial to all of us.”
No wonder some pediatricians are starting to question fluoride:

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