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The Dose Makes the Poison (1/2)

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Uploaded on Oct 15, 2009

Chemical toxins are a real health risk. So is radiation. But should we be extrapolating the effects of certain toxins at high doses down to a low-level exposure? Is this a linear non-threshold relationship between exposure and health effects?

When we evaluate the arguments of non-scientists, websites, media figures, and pseudoscience publications, a pattern emerges of extrapolation that is not justified from the evidence. Mercury in flu vaccines are present at a small fraction of the dose that is known to cause deterministic health effects. Squalene is found at higher doses in the human liver than in vaccines. And fluoride is only dangerous when it's at 5-10 times higher levels than are found in drinking water in the western world.

If you are interested in learning more, I suggest you start with the following sites:
http://en.wikipedia.org/wiki/Linear_n...
http://en.wikipedia.org/wiki/Radiatio...
"Hormesis: a revolution in toxicology, risk assessment and medicine" EMBO Rep. 2004 October; 5(Suppl 1): S37S40. doi: 10.1038/sj.embor.7400222.
http://www.cdc.gov/vaccinesafety/upda...
http://www.fda.gov/BiologicsBloodVacc...
http://en.wikipedia.org/wiki/Squalene

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