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CD-ROM Today (UK) (Spanish) 15
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01973.txt
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1994-01-17
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$Unique_ID{BRK01973}
$Pretitle{}
$Title{Benefits of Green Tea Against Cancer}
$Subject{benefit Benefits Green Tea teas Cancer cancers cancerous stomach
tannin Camellia sinensis chemical chemicals phytochemical phytochemicals Black
Oolong plant plants Epigallocatechin gallate EGCG antioxidant antioxidant
caffeine coffee coffees}
$Volume{}
$Log{
Anatomy of the Stomach-Esophagus*0008702.scf}
Copyright (c) 1993 Tribune Media Services, Inc.
Benefits of Green Tea Against Cancer
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QUESTION: I have been given to understand that the population of Japan has a
far smaller number of cases of stomach cancer than we do in the United States.
I also understand that this is the result of the tannin in the green tea they
drink. Can you offer me an in depth explanation of this if you know anything
about it? I would like to know if I should add green tea to my menu. Thank
you.
------------------------------------------------------------------------------
ANSWER: Green tea is one of three different types of tea produced from the
leaves of the Camellia sinensis. These leaves contain a large number of plant
chemicals or phytochemicals, and these may change depending upon the process
used in the preparation of the tea. Both Black tea and Oolong tea can be
produced as well as Green tea. Green tea is prepared in a manner that
conserves the polyphenols that are present in the leaf. It is these
polyphenols, often mistakenly called tannins, that are suspected of being the
plant chemical responsible for the lowered incidence of cancer, particularly
stomach cancer in recent surveys of the Japanese population.
The polyphenols in Green tea account for about 15-30 percent of the
weight of the leaf. About half of this is chemical known as Epigallocatechin
gallate (EGCG), the most biologically active of the polyphenols in Green tea.
It is this compound that has attracted the interest of research scientists
seeking to understand the relationship between Green tea and the low cancer
rates. It may act as an antioxidant, but other possibilities are also being
investigated.
A cup of brewed green tea (4 ounces) contains about 60-125 mg of
polyphenols, about half of which is EGCG. You may also be interested in the
fact that the same cup of tea would contain 35-50 mg of caffeine, compared to
the 75-95 mg contained in a cup of coffee.
Before you make the decision that Green tea is the answer to your
prevention strategy, be aware that in the Japanese population that was
studied, the average daily consumption of Green tea was between 10-20 cups a
day (4 ounces), and it may be that the protective effect requires this amount
of tea intake.
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The material contained here is "FOR INFORMATION ONLY" and should not replace
the counsel and advice of your personal physician. Promptly consulting your
doctor is the best path to a quick and successful resolution of any medical
problem.