ALL ABOUT GREEN TEA AND POLYPHENOLS
BY: KURT HURLEY
-a discovery is said to be an accident meeting a
prepared mind, albert von szent-gyorgyi (1893 -
1986)
or as i like to say… when the student is ready,
THE TEACHER SHALL APPEAR! BY THE WAY, HAVE I
said how much i passionately enjoy green tea,
the personal benefits i have witnessed from
GREEN TEA AND WHAT A FANTASTIC UNEARTHING THIS
`ancient medicine' is for modern western living?
AFTER A GOOD DEAL OF RESEARCH, I HAVE FOUND THAT
there isn't any other food or drink in general
consumption reported to have the innumerable
HEALTH BENEFITS THAT GREEN TEA POSSESSES...NONE!
the chinese have known about the medicinal
BENEFITS OF GREEN TEA SINCE ANCIENT TIMES, USING
it to treat everything from headaches and
lethargia to depression. and did you know that
GREEN TEA HAS BEEN USED AS A MEDICINE IN CHINA
for over 4,000 years… when will we westerners
learn?
at present, in both asia and america, scientific
research is providing a more than solid
SUBSTANTIATION FOR THE HEALTH BENEFITS LONG
associated with drinking green tea. for
instance, in 1994 the journal of the national
CANCER INSTITUTE PUBLISHED THE RESULTS OF AN
epidemiological study demonstrating that
drinking green tea reduced the risk of
ESOPHAGEAL CANCER IN CHINESE MEN AND WOMEN BY
nearly sixty percent. conversely, university of
purdue researchers recently concluded that a
COMPOUND IN GREEN TEA INHIBITS THE GROWTH OF
cancer cells. there is also research indicating
that drinking green tea lowers total cholesterol
LEVELS, AS WELL AS IMPROVING THE RATIO OF GOOD
(hdl) cholesterol to bad (ldl) cholesterol.
TO ABRIDGE JUST A FEW OF THE MEDICAL CONDITIONS
in which drinking green tea has proved to be
helpful:
impaired immune system function
CARDIOVASCULAR DISEASE
cancer
rheumatoid arthritis
ELEVATED CHOLESTEROL LEVELS
numerous types of infections
muscle wasting diseases
GREEN TEA'S `SECRET' LIES IN THE FACT IT IS RICH
in catechin polyphenols, particularly
epigallocatechin gallate (egcg). egcg is a
POWERFUL ANTI-OXIDANT: BESIDES INHIBITING THE
growth of cancer cells, it kills cancer cells
without harming healthy tissue. it has also been
EXCEEDINGLY EFFECTIVE IN LOWERING LDL
cholesterol levels, and inhibiting the abnormal
formation of blood clots. the preceding takes on
ADDED IMPORTANCE WHEN YOU CONSIDER THAT
thrombosis (the formation of abnormal blood
clots) is the foremost cause of heart attacks
AND STROKE. QUITE STARTLING, DON'T YOU THINK?
for the record books…
correlates are being drawn between the effects
of drinking green tea and the "french paradox."
FOR YEARS, RESEARCHERS WERE MYSTIFIED BY THE
fact that, despite consuming a diet rich in
saturated fat, the french have a lower incidence
OF HEART DISEASE THAN AMERICANS. THE ANSWER WAS
found to lie in red wine, which contains
resveratrol, a polyphenol that limits the
NEGATIVE EFFECTS OF SMOKING AND A FATTY DIET. IN
a 1997 study, researchers from the university of
kansas concluded that egcg is twice as powerful
AS RESVERATROL, WHICH MAY EXPLAIN WHY THE RATE
of heart disease among japanese men is
significantly low, even though in excess of
SEVENTY-FIVE PERCENT ARE SMOKERS.
so why don't other chinese teas have similar
EARTH-SHAKING HEALTH BENEFITS? GREEN, OOLONG,
and black teas all come from the leaves of the
camellia sinensis plant. what sets green tea
APART IS THE WAY IT IS
PROCESSED.IN PARTICULAR,
green tea leaves are steamed, which prevents the
egcg compound from being oxidized. by contrast,
BLACK AND OOLONG TEA LEAVES ARE PROCESSED FROM
fermented leaves, which results in the egcg
being transformed into other compounds that are
NOT NEARLY AS EFFECTIVE IN PREVENTING AND
fighting various conditions and diseases.
SOME ADDITIONAL BENEFITS…
the latest evidence emerging is that green tea
CAN EVEN HELP DIETERS ATTAIN SUCCESS MORE
rapidly an efficiently. in november, 1999, the
american journal of clinical nutrition published
THE RESULTS OF A STUDY AT THE UNIVERSITY OF
geneva in switzerland. researchers found that
men who were given a combination of caffeine and
GREEN TEA EXTRACT BURNED MORE CALORIES THAN
those given only caffeine or a placebo.
INCIDENTALLY, GREEN TEA CAN EVEN HELP PREVENT
tooth decay! just as its bacteria-destroying
abilities can help prevent food poisoning, it
CAN ALSO KILL THE BACTERIUM THAT CAUSES DENTAL
plaque. meanwhile, skin preparations containing
green tea - from deodorants to creams - are
STARTING TO APPEAR ON THE MARKET SHOWING
positive effects.
THE POTENTIAL UNSAFE EFFECTS?
as of today, the only adverse side effect
REPORTED FROM DRINKING GREEN TEA IS MILD
insomnia due to the fact that it contains
caffeine. on the other hand, green tea contains
MUCH LESS CAFFEINE THAN COFFEE AND MOST SODA:
there are approximately thirty to sixty mg. of
caffeine in six - eight ounces of tea, compared
TO OVER ONE-HUNDRED MG. IN EIGHT OUNCES OF
coffee and can you imagine the huge contrast in
caffeine content between green tea and these
`NEW' HIGH-TECH ENERGY DRINKS THAT ARE CURRENTLY
being consumed by the masses with such ravenous
voracity.
green tea polyphenols, what are they you ask?
SPECIFICALLY, TEA POLYPHENOLS ARE COMPOUNDS IN
tea leaves that are natural plant antioxidants.
antioxidants have been proven to prevent damage
CAUSED BY FREE RADICALS TO DNA AND OTHER
molecules.
HOW DO THEY WORK?
green tea polyphenols have corroborated several
CANCER PREVENTIVE PROPERTIES. IN ADDITION TO
antioxidant activity, these compounds may as
previously mentioned have shown to reduce
ABNORMAL CELL GROWTH AND INFLAMMATION; HELP THE
body get rid of cancer-causing agents; and
restore communication between different cells in
THE BODY.
on cancer… the facts
the relationship between green tea consumption
and human cancer has been studied in several
DIFFERENT POPULATIONS AND AT VARIOUS CANCER
sites. some of the studies comparing green tea
drinkers to non-green tea drinkers support the
CLAIM THAT GREEN TEA-DRINKING, IN FACT PREVENTS
certain types of cancer. certain dietary,
environmental, and population differences may
ACCOUNT FOR THESE DISCREPANCIES. IN ANIMAL
studies, different tea extracts, tea polyphenol
mixtures, purified tea components, and tea
INFUSIONS AS THE SOLE DRINKING FLUID HAVE MORE
consistently been shown to prevent cancer,
including cancers of the colon, esophagus,
LIVER, STOMACH, LUNG, BREAST, PANCREAS, AND
skin. the purified component, epigallocatechin
gallate (egcg), prevented colon cancer, but did
NOT PREVENT CANCER OF THE ESOPHAGUS IN ANIMAL
models. a polyphenol mixture with egcg, called
polyphenon e, has also shown cancer preventive
PROPERTIES IN ANIMALS. ANIMAL STUDIES WERE
inconclusive as to whether egcg or polyphenol e
caused dna mutations that might trigger cancer
GROWTH. BOTH EGCG AND POLYPHENON E ARE BEING
tested for safety and efficacy in humans.
SLOWER PROSTATE CANCER CELL GROWTH FOUND FROM
consumption of green and black tea
A STUDY AT THE EXPERIMENTAL BIOLOGY 2004, IN
washington, d.c., reported as part of the
scientific program of the american society of
NUTRITIONAL SCIENCES, ANTI-TUMOR EFFECTS OF
green and black tea polyphenols in human tissue.
and researchers at the university of california
AT LOS ANGELES FOUND AND WERE ABLE TO DETECT TEA
polyphenols in prostate tis