Thursday, 12 July 2012

Cairns Post Letters from the Wingnuts #8 (It's all in the dose)

And so to another repeat offender, the Far North Queensland Coordinator for Queenslanders for Safe Water, Air and Food, Bill Kilvert. Bill popped up in my Cairns Post Letters from the Wingnuts #4, in which he reminded us of the Yellow Peril from China. In his letter published on Monday he seems to have tried a little harder and, if not looked at closely, it may even seem impressive.
Sorry Pam Dickenson (7-5-12), water fluoridation is not just about teeth. It is also about the dangerous effects to vital organs in the human body.
Sigh... So much for my previously mentioned "fluoride damaged internal organs are wonderful, so we should start mega-dosing the water supply with fluoride" argument.
Overseas research is showing that silicofluorides can take aluminium through the blood brain barrier and can result in long term alzheimers disease.
Epidemiological studies do not show an increase in the prevalence of alzheimers' disease in areas with fluoridation at the level being recommended in our water supplies.
Silicofluorides can replace the iodine in the thyroid gland and the resultant underactivity can cause depression and obesity.
Unsurprisingly things are more complex than Mr Kilvert asserts, with note needing to be taken of both the iodine and fluorine intake levels. Excessive fluorine intake can either inhibit or stimulate thyroid function, depending on whether iodine levels are deficient or excessive. Fluoridation at the levels proposed, however, especially in a population with proper iodine intake, is not linked to thyroid deficiency.
The US Centers for Disease Control has warned about the dangers of mixing baby formula with fluoridated tap water, as silicofluorides can lower the IQ.
Actually the CDC says "You can use fluoridated water for preparing infant formula. However, if your baby is exclusively consuming infant formula reconstituted with fluoridated water, there is an increased potential for mild dental fluorosis." One struggles to think why we should assume Mr Kilvert is being anything but dishonest.
Dental fluorosis - white spots on children's teeth - indicates a more severe hazardous skeletal fluorosis.
Dental fluorosis may indicate an increased risk of skeletal fluorosis. The more severe the dental fluorosis is, the greater the increased risk. There is a recognised risk of both skeletal and dental fluorosis at levels several times that recommended for our water supplies. Fluoridation at the levels suggested, however, is safe.
Arthritis can be caused by water fluoridation and the fluoride in your cup of tea.
Dose response really is a difficult concept for the anti-fluoridation lot. There is certainly some evidence to support an assertion that fluoride intake several times higher than that suggested can be a risk factor in of some forms of arthritis. Similarly, there is also evidence that fluoride is an effective therapy for some forms of arthritis. Expert panels have investigated all the evidence and come up with recommendations for safe and effective levels of fluoride in drinking water.
Our governments do not want to do the research and are saying "what you don't know can't harm you".
I have to assume that there is no drumroll needed before saying that Mr Kilvert is wrong. Our governments have done the research and would like you to look at it.

For example, the National Health and Medical Research Council is Australia’s leading expert body promoting the development and maintenance of public and individual health standards. In 2007 the Council published A Systematic Review of the Efficacy and Safety of Fluoridation, after it investigated the caries-reducing benefits and associated health risks of providing fluoride systemically. It's findings included:
  • Community water fluoridation is beneficial for reducing dental caries (tooth decay).
  • Water fluoridation at optimal levels does not affect the risk of bone fractures.
  • There is no clear association between water fluoridation and overall cancer incidence or mortality.
  • The reviewed studies do not suggest an increased risk of adverse health effects at optimal fluoridation levels.
Once again, it is hard to see why we should not doubt Mr Kilvert's honesty.

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