Green Tea Herbal Drink Description
Reading this over a cup of coffee? Next time why not
try tea. Green Tea is a common beverage choice in China and Japan, but
not in the rest of the world. Regular tea, the stuff in those handy little
tea bags contain polyphenols an antioxidant which may counteract free radicals
in the body, which many believe are linked to disease by damaging healthy
DNA in the body. Our Green Tea Concentrate is a unique formula of vitamins,
minerals and energy herbs. Try a cup hot or cold today!
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More Information on Green Tea Herbal Drink
This product contains:
GREEN TEA HERBAL DRINK
Historical or traditional use (may or may not be supported by scientific
studies)
According to Chinese legend, tea was discovered accidentally by an
emperor 4,000 years ago. Since then, Traditional Chinese Medicine has recommended
green tea for headaches, body aches and pains, digestion, depression, immune
enhancement, detoxification, as an energizer, and to prolong life.
Active constituents
Green tea contains volatile oils, vitamins, minerals, and caffeine,
but the primary constituents of interest are the polyphenols, particularly
the catechin called epigallocatechin gallate (EGCG). The polyphenols are
believed to be responsible for most of green tea's roles in promoting good
health.1
Green tea has been shown to mildly lower total cholesterol levels and
improve the cholesterol profile (decreasing LDL "bad" cholesterol and increasing
HDL "good" cholesterol) in most,2 3 4 5 but not all,6 studies. Green tea
may also promote cardiovascular health by making platelets in the blood
less sticky.
Green tea has also been shown to protect against damage to LDL ("bad")
cholesterol caused by oxygen.7 Consumption of green tea increases antioxidant
activity in the blood.8 Oxidative damage to LDL can promote atherosclerosis.
While population studies have suggested that consumption of green tea is
associated with protection against atherosclerosis,9 the evidence is still
preliminary.
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Several animal and test tube studies have demonstrated an anticancer
effect of polyphenols from green tea.10 11 12 In one of these studies,
a polyphenol called catechin from green tea effectively inhibited metastasis
(uncontrolled spread) of melanoma (skin cancer) cells.13 The polyphenols
in green tea have also been associated with reduced risk of several types
of cancer in humans.14 15 16 However, some human studies have found no
association between green tea consumption and decreased cancer risk.17
18
In a double-blind trial, people with leukoplakia (a pre-cancerous oral
condition) took 3 grams orally per day of a mixture of whole green tea,
green tea polyphenols, and green tea pigments orally, and also painted
a mixture of the tea on their lesions three times daily for six months.19
As compared to the placebo group, those in the green tea group had significant
decreases in the pre-cancerous condition.
Compounds in green tea, as well as black tea, may reduce the risk of
dental caries.20 Human volunteers rinsing with an alcohol extract of oolong
tea leaves before bed each night for four days had significantly less plaque
formation, but similar amounts of plaque-causing bacteria, compared to
those with no treatment.21
Green tea polyphenols have been shown to stimulate the production of
several immune system cells, and have topical antibacterial properties—even
against the bacteria that cause dental plaque.22 23 24
One study found that intake of 10 cups or more of green tea per day
improved blood test results, indicating protection against liver damage.25
Further studies are needed to determine if taking green tea helps those
with liver diseases.
Tea flavonoids given by capsule reduced fecal odor and favorably altered
the gut bacteria in elderly Japanese with feeding tubes living in nursing
homes.26 The study was repeated in bedridden elderly not on feeding tubes,
and green tea was again shown to improve their gut bacteria.27 These studies
raise the possibility of using green tea in other settings where gut bacteria
are disturbed, such as after taking antibiotics. Further studies are needed
to clarify the role of green tea in this respect, however.
High-tannin tea has been shown to reduce the need for blood removal
from people with iron overload, or hemochromatosis, in an open study.28
The tea had to be taken with meals and without lemon or milk to be effective.
Tea is believed to help in hemochromatosis by preventing iron absorption.
How much is usually taken?
Much of the research documenting the health benefits of green tea is
based on the amount of green tea typically consumed in Asian countries—about
3 cups (750 ml) per day (providing 240–320 mg of polyphenols).29 However,
other research suggests as much as 10 cups (2,500 ml) per day is necessary
to obtain noticeable benefits from green tea ingestion.30 31 To brew green
tea, 1 teaspoon (5 grams) of green tea leaves are combined with 1 cup (250
ml) of boiling water and steeped for three minutes. Decaffeinated tea is
recommended to reduce the side effects associated with caffeine, including
anxiety and insomnia. Tablets and capsules containing standardized extracts
of polyphenols, particularly EGCG, are available. Some provide up to 97%
polyphenol content—which is equivalent to drinking 4 cups (1,000 ml) of
tea. Many of these standardized products are decaffeinated.
Are there any side effects or interactions?
Green tea is generally free of side effects. The most common adverse
effects reported from consuming large amounts (several cups per day) of
green tea are insomnia, anxiety, and other symptoms caused by the caffeine
content in the herb.
An extract of green tea taken by healthy women with a meal inhibited
the absorption of non-heme iron (e.g., the form of iron in plant foods)
by 26%.32 Frequent use of green tea could, in theory, promote the development
of iron deficiency in susceptible individuals.
Are there any drug interactions?
Certain medicines may interact with green tea. Refer to drug interactions
for a list of those medicines.
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