Tea and Health Care
Tea,
traditional product of China, has become one of the world′s
three major kinds of non—alcoholic drinks. In fact, tea is presently consumed in a larger area
worldwide than coffee and cocoa; the other popular vererage.
Why did the habit of tea—drinking
spread from China to every corner of world? The answer lies in
its health promoting properties.
That drinking tea can benefit
us both mentally and physically is frequently mentioned in
ancient Chinese book. In″ Shennong′s Herbal, ″ it is
said that″ habitual drinking can ease one′s mind and
benefit one′s Qi (vital energy)…increase
one′s stamina and keep us refresh and young .″ Shennong′s
Treatise on Food″ also records that″ drinking tea gives
one a clear mind. ″ Later on , it was discovered that
drinking tea not only strengthens the body but also cures
certain diseases. For example. Lu Yu in his book″ The
treatise on Tea″ said,″ Tea is cold in taste and is most
suited for drinking……If
one is thirsty or has headache, tired eyes, restlessness of
four limbs and uncomfortable joints, then a few sips of tea
can be as good manna. ″ In the Ming Dynasty, Zhang Qiande,
author of a book also called″ A Treatise on Tea″ says,″
Drinking tea slakes thirst, aids digestion, keeps off
diseases, shortens the time for sleeping, retention, improve eye —
sight, brings clear thinking and removes disturbances; humans
should not stop drinking tea for even a single day.″ In the
past hundreds of years, many people have believed that there really
are numerous advantages of drinking tea. However, until
recently, this was only a kind of intuitive understanding,
since there was no supporting evidence or exposition in
scientific theory.
With the recent advancement in
science and technology, the substances that comprise tea and
their effects on human physiological mechanisms have become
the subject of scientific experimentation and research; and
mystery of tea in promoting bodily health and curing diseases
is gradually being unveiled. According to chemical tests, tea
is now know to contain more than three hundred and twenty
different kinds of chemicals. The major ones are polyphones,
caffeine, perfume oils and various vitamins. These chemicals
have certain positive effects on people′s health.
The
polyphones, which amount
to around 20% to 30% of the total weight of dry tea, have
restraining properties, activate saliva secretion and so slake
the thirst, Polyphones are in blood and alkaloid. Therefore,
drinking tea can aid sobriety and reduce the effects of nicotine
on smokers. Polyphones have a strong ability to
solidify proteins and, since the main constituting substance
of germ cells is protein, concentrated tea can kill germs.
Concentrated tea be applied effectively instead of iodine, and
it also helps to cure dysentery.
Polyphone in tea is composed
of more than thirty phenol substances of which caffeine
amounts to around 7%. Caffeine benefits the human body in a
number of ways. Function ting in the same way as vitamin p, it
facilitates the accumulation and assimilation of vitamins;
reduces the accumulation of end and neutral fats in the blood
and the liver and improves the elasticity and pressure—resisting
ability of blood capillaries. Consequently, the halit of
drinking tea will prevent high blood pressure,
arteriosclerosis and coronary teart diseases.
Caffeine is a major alkaloid.
It stimulates the central nervous system, facilitates blood
circulation, strengthens muscular contraction and aids
metabolism. Thus one′s efficiency level. It is also a
diuretie which stimulates the kidney, relieves water retention
and thus speeds up the expulsion of bodily toxins and wastes.
Hence, tea drinkers rarely suffer from nephrosis. Owing to the
diuretic functions of caffeine, drinking concentrated tea
helps to relieve drunkenness by expelling the dissolved
aalcohol through urination. Therefore, the old saying that′
relieving drunkenness demonstrates the usefulness of tea″ is
scientifically well grounded.
It has been said that the
excessive intake of caffeine will lead to intoxication; but
heavy tea drinkers need not be alartmed by this since they are
well within the recommended limits. According to some studies,
the permissible intake of caffeine is 0.35 to 0.5g in one dose
and the daily intake should not exceed 1.5g Since we use no
more than 3g of dry tea, containing only 0.012g of caffeine,
to make each cup, it can be seen that, even if we drink 20
cups of tea a day, our total intake of caffeine is only 0.24g
well below the permissible limit.
The aromatic compounds are the
main constituents in determining the quality of tea. Having a
cup of flagrant tea makes one feel relaxed and the aromatic
compounds help dissolve fat and aid digestion. Therefore,
people who consume a lot of fat and dairy products, will
benefit from drinking tea and they will fell uncomforted table
if
they don′t drink tea for even a single day. In some cases,
they will even feel sick.
There are various types of
vitamins in tea. Among them, vitamins B1, B2, C, P and PP can
be absorbed by the human body and vitamin C predominates. In
lkg of tea, there is 1.5g of vitamin C. In general, vitamin C
wil be spoiled if it is kept in water at 30℃
for 15g minutes. For this reason, drinking tea is a good way
to replenish this important vitamin.
A small amount of
Fluorine; an
essential building element of bones, teeth, hair and nails, is
found in tea. Flourine can strengthen the acid resistance of
teeth, thus preventing cavities, and tea provides a convenient
and readily absorbe source of this valuable chemical.
Furthermore, the inorganic
salts and carbohydrates compound in tea are also beneficial to
metabolism and health care.
Recently, some countries have
conducted extensive research into how to combat excess—weight;
and they have discovered that tea is really effective in this
ares. In 1977 a medical faculty of a Japanese University
conducted a research of the pharmacological effects on Chinese
Oolong tea. The research comprised comprehensive chemical
examination and clinical experimentation. According to the
report, the even subjects who on average drank 5—6
cups Oolong tea a day for six weeks, had their Cholesterol level reduced form 214/100ml to 205/100ml and weight from 61kg
to 51.9kg. The results were significant and no side effects
were detected. Many countries were very interested in the
result, and various brand of slimming tea are now being
promoted in sensationally.
According
to foreign reports, a lot of people died fo atomic radiation
at the end of World War II when Hiroshima and Nagasaki were
bombed. However, the symptoms were less serious and the death
rate was lower for those people who had the habit of drinking
tea, Later, some countries conducted experiments on this.
After rats were exposed to radiation, one group was fed with
concentrated tea whereas the other group was not. The former
group survived but all rats in the latter group died. This was
because the caffeine in tea can neutralize the atomic
radioactive substance, thus preventing of lessening its harmful
affects on living organisms. Recently, reports form abroad
conclude that the lip polysaccharide in tea has certain
effects in eliminating the harm incurred by atomic radiation.
Therefore tea can also claim to be a″ drink of the atomic age.
If you have any needs of Chinese tea and other products,
please to tell us .
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