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March 24, 2008 |
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TEA AND SOIL POLLUTANTS
As more of the earth's soils become polluted with industrial wastes, there
is increasing concern that the foods we eat and even the tea we drink may be polluted.
Cadmium, for example-used in the battery and television screen industries-has found its
way into some soils where food is grown. Similarly, arsenic-used in the wood treatment
and semiconductor industries-has also found itself in soils used to grow crops. Both are
highly toxic. Neither would be welcome in our tea. So are they?
Good news for tea drinkers. Investigators ask this question and reported
their answers in the Chinese Journal of Zhejiang University. Science. B. The study found
that both cadmium and arsenic were poorly absorbed by the Camellia sinensis plant used to make
tea. Furthermore, the young feeding roots of this plant serve as effective barriers against
either element rising to plant parts above the soil.
It would appear from this study that the plant that gives us tea is relatively
effective in preventing arsenic and cadmium?even when present in the soil?from entering the young
leaves typically used to manufacture tea. drpaulsupdates.org
Copyright © 2008 Dr. Paul's School of Tea and Health, LLC. See Update #64F for more information.
Send requests for copying and distribution to drpaulstea@npgcable.com.
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