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Originally Posted by Prissy
FYI The fake ones from China contains lead poison in them.
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I think you're okay as far as lead is concerned with either fake or real...
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Being insoluble, small quantities of Pb-210 are retained in lungs, releasing radiation as it decays to Polonium-210. The average 1 pack a day smoker is exposed to the equivalent of over ten times the average US background radiation exposure, roughly one third of this from Pb-210. It is unlikely to be predominantly responsible for the increased risk of lung cancer by itself.
Cigarettes contain over 4000 chemicals; over 20 are probably carcinogenic and over 60 mutagenic (affecting genes and their impacts). Cigarette smoke increases the vulnerability of lung tissue to radiation and other carcinogens. There is weak and dated evidence that Pb-210 could play a role in lung cancer.
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You'll surely be affected by the other carcinogenic and mutagenic chemicals before lead.
http://www.lead.org.au/fs/fst65.html