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All About Green Tea And Polyphenols

-A discovery is said to be an accident How Do They Work?
meeting a prepared mind, Albert von Green tea polyphenols have corroborated
Szent-Gyorgyi (1893 - 1986) several cancer preventive properties. In
Or as I like to say... When the student addition to antioxidant activity, these
is ready, the teacher shall appear! By compounds may as previously mentioned
the way, have I said how much I have shown to reduce abnormal cell growth
passionately enjoy green tea, the and inflammation; help the body get rid
personal benefits I have witnessed from of cancer-causing agents; and restore
green tea and what a fantastic unearthing communication between different cells in
this 'ancient medicine' is for modern the body.
western living? On Cancer... The Facts
After a good deal of research, I have The relationship between green tea
found that there isn't any other food or consumption and human cancer has been
drink in general consumption reported to studied in several different populations
have the innumerable health benefits that and at various cancer sites. Some of the
green tea possesses...none! studies comparing green tea drinkers to
The Chinese have known about the non-green tea drinkers support the claim
medicinal benefits of green tea since that green tea-drinking, in fact prevents
ancient times, using it to treat certain types of cancer. Certain dietary,
everything from headaches and lethargia environmental, and population differences
to depression. And did you know that may account for these discrepancies. In
green tea has been used as a medicine in animal studies, different tea extracts,
China for over 4,000 years... When will tea polyphenol mixtures, purified tea
we westerners learn? components, and tea infusions as the sole
At present, in both Asia and America, drinking fluid have more consistently
scientific research is providing a more been shown to prevent cancer, including
than solid substantiation for the health cancers of the colon, esophagus, liver,
benefits long associated with drinking stomach, lung, breast, pancreas, and
green tea. For instance, in 1994 the skin. The purified component,
Journal of the National Cancer Institute epigallocatechin gallate (EGCG),
published the results of an prevented colon cancer, but did not
epidemiological study demonstrating that prevent cancer of the esophagus in animal
drinking green tea reduced the risk of models. A polyphenol mixture with EGCG,
esophageal cancer in Chinese men and called Polyphenon E, has also shown
women by nearly sixty percent. cancer preventive properties in animals.
Conversely, University of Purdue Animal studies were inconclusive as to
researchers recently concluded that a whether EGCG or Polyphenol E caused DNA
compound in green tea inhibits the growth mutations that might trigger cancer
of cancer cells. There is also research growth. Both EGCG and Polyphenon E are
indicating that drinking green tea lowers being tested for safety and efficacy in
total cholesterol levels, as well as humans.
improving the ratio of good (HDL) Slower Prostate Cancer Cell Growth Found
cholesterol to bad (LDL) cholesterol. From Consumption Of Green And Black Tea
To abridge just a few of the medical A study at The Experimental Biology 2004,
conditions in which drinking green tea in Washington, D.C., reported as part of
has proved to be helpful:impaired immune the scientific program of the American
system functioncardiovascular Society of Nutritional Sciences,
diseasecancerrheumatoid arthritiselevated anti-tumor effects of green and black tea
cholesterol levelsnumerous types of polyphenols in human tissue. And
infectionsmuscle wasting diseases researchers at the University of
Green tea's 'secret' lies in the fact it California at Los Angeles found and were
is rich in catechin polyphenols, able to detect tea polyphenols in
particularly epigallocatechin gallate prostate tissue after a very limited
(EGCG). EGCG is a powerful anti-oxidant: consumption of the tea. More notably, the
besides inhibiting the growth of cancer scientists found that prostate cancer
cells, it kills cancer cells without cells grew more slowly when placed in a
harming healthy tissue. It has also been medium containing blood serum of men who
exceedingly effective in lowering LDL had consumed either green or black tea
cholesterol levels, and inhibiting the for five days compared to serum collected
abnormal formation of blood clots. The before the men began their tea-drinking
preceding takes on added importance when regimen. Serum from men who drank
you consider that thrombosis (the comparable amounts of diet or regular
formation of abnormal blood clots) is the soda showed no such slowing in cancer
foremost cause of heart attacks and cell proliferation.
stroke. Quite startling, don't you think? Consequently, Dr. Susanne Henning, UCLA
For The Record Books... Center for Human Nutrition, pronounced
Correlates are being drawn between the that the UCLA research team - a
effects of drinking green tea and the combination of nutrition scientists and
"French Paradox." For years, researchers urologists - focused on the feasible
were mystified by the fact that, despite outcome of tea polyphenols on factors
consuming a diet rich in saturated fat, named polyamines and the enzymes
the French have a lower incidence of responsible for the production of
heart disease than Americans. The answer polyamines. Elevated levels of polyamines
was found to lie in red wine, which have been connected with malignancy in
contains resveratrol, a polyphenol that humans, including prostate cancer, and -
limits the negative effects of smoking since polyamines are current in prostate
and a fatty diet. In a 1997 study, tissue in high concentration - are
researchers from the University of Kansas considered a logical target for
concluded that EGCG is twice as powerful chemoprevention of prostate cancer.
as resveratrol, which may explain why the Prostate cancer is one of the most
rate of heart disease among Japanese men widespread cancers among males in the
is significantly low, even though in United States, and more than a fourth of
excess of seventy-five percent are all those patients with prostate cancer
smokers. are known to use alternative therapies,
So why don't other Chinese teas have including green tea. This study suggests
similar earth-shaking health benefits? that both black and green tea are
Green, oolong, and black teas all come promising natural dietary supplements
from the leaves of the Camellia sinensis useful for chemoprevention of prostate
plant. What sets green tea apart is the cancer, according to Dr. Henning. She
way it is processed.In particular, green plans to investigate if this effect can
tea leaves are steamed, which prevents be enhanced by consuming larger amounts
the EGCG compound from being oxidized. By of tea polyphenols in the form of green
contrast, black and oolong tea leaves are tea extract supplement capsules.
processed from fermented leaves, which So If It's That Good, How Much Should I
results in the EGCG being transformed Drink?
into other compounds that are not nearly Strangely enough, there are as many
as effective in preventing and fighting answers to this question as there are
various conditions and diseases. researchers investigating the beneficial
Some Additional Benefits... properties of green tea and polyphenols.
The latest evidence emerging is that Herbs for Health magazine mentions a
green tea can even help dieters attain Japanese report citing that men who drank
success more rapidly an efficiently. In ten cups of green tea per day stayed
November, 1999, the American Journal of cancer-free for three years longer than
Clinical Nutrition published the results men who drank less than three cups a day
of a study at the University of Geneva in (there are approximately 240 - 320 mg of
Switzerland. Researchers found that men polyphenols in three cups of green tea).
who were given a combination of caffeine Meanwhile, a study by Cleveland's Western
and green tea extract burned more Reserve University concluded that
calories than those given only caffeine drinking four or more cups of green tea
or a placebo. per day could help prevent rheumatoid
Incidentally, green tea can even help arthritis, or reduce symptoms in
prevent tooth decay! Just as its individuals already suffering from the
bacteria-destroying abilities can help disease. And Japanese scientists at the
prevent food poisoning, it can also kill Saitama Cancer Research Institute have
the bacterium that causes dental plaque. discovered that there were fewer
Meanwhile, skin preparations containing recurrences of breast cancer, and the
green tea - from deodorants to creams - disease spread less quickly, in women
are starting to appear on the market with a history of drinking five cups or
showing positive effects. more of green tea daily.
The Potential Unsafe Effects? A University of California study on the
As of today, the only adverse side effect cancer-preventative qualities of green
reported from drinking green tea is mild tea concluded that you could probably
insomnia due to the fact that it contains attain the desired level of polyphenols
caffeine. On the other hand, green tea by drinking merely two cups per day. So
contains much less caffeine than coffee which is it? I personally don't buy the
and most soda: there are approximately hype that those that manufacture and sell
thirty to sixty mg. of caffeine in six - green tea products are
eight ounces of tea, compared to over propagating...moderation is, like with
one-hundred mg. in eight ounces of coffee all things probably your best bet! But
and can you imagine the huge contrast in given all the evidence, it is almost
caffeine content between green tea and certainly safe to plan on drinking four
these 'new' high-tech energy drinks that to five cups of green tea daily. If
are currently being consumed by the you're a real aficionado, by all means
masses with such ravenous voracity. imbibe more; but whether or not you'll
Green Tea Polyphenols, What Are They You derive added health benefits remains to
Ask? be determined.
Specifically, tea polyphenols are Okay, enough science... Let's all just
compounds in tea leaves that are natural relax and have a cup of green tea or if
plant antioxidants. Antioxidants have you like your beverages cold like I do, a
been proven to prevent damage caused by glass of 'iced' green tea.
free radicals to DNA and other molecules.




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