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GREEN
TEA
Green, black
and oolong teas all originate from Camellia sinensis, the tea
plant. The method of preparation determines which variety of
beverage results. The harvested leaves are allowed to oxidise to
produce black tea, and partially oxidise to produce oolong tea.
Green tea is not allowed to oxidise. Tea leaves not allowed to
oxidise retain their health benefits which are almost entirely lost
in black tea. Traditional Chinese medical uses for Green Tea include
headaches, digestion, depression, immune function, detoxification
and an energy booster.
The Benefits of Green Tea
Atherosclerosis (hardened arteries)
- Green Tea increases antioxidant activity in the blood, protecting
against damage to LDL cholesterol. Damage to LDL cholesterol, caused
by 'oxidation' from fried foods, smoking and stress, causes damage
to the artery wall upon which the cholesterol sits. This damage
leads to the hardening of the artery wall.
High cholesterol
- Green Tea may improve cholesterol profiles by increasing 'good'
cholesterol (HDL) and decreasing 'bad' cholesterol (LDL), as well as
mildly reducing total cholesterol overall. Improving the HDL to LDL
ratio, as well as lowering total overall cholesterol helps prevent
heart disease.
Immune booster-
The
polyphenols in Green Tea stimulate the production of several types
of immune cells. Green Tea also has antibacterial and antioxidant
properties.
Weight loss
- Green Tea's polyphenols may both increase metabolism and decrease
the breakdown of fat in the digestive system, so reducing its
absorption. Increasing the metabolic rate means the cells generate
more energy and the person feels more active.
Properties
In human
trials, Green Tea polyphenols have prevented nitrates (usually found
in cured meat products) binding to amino acids, so reducing the
formation of nitrosamines, strong cancer causing agents. Antioxidant
activity also contributes to a strong immune system. Green Tea's
polyphenols,
not caffeine, are regarded as being responsible for increasing the
metabolism. Polyphenols are not associated with the side effects of
caffeine, such as "jitteriness". Green Tea may improve
cardiovascular health by inhibiting the digestion of fats and making
blood less sticky. Green tea has improved gut bacteria balance in
elderly people. Friendly gut bacteria may also prevent the
re-absorption of cholesterol by breaking down bile salts.
Contra-indications / Precautions
Being high in
tannins, Green Tea may interfere with the absorption of several
medications. Taking Green Tea supplements at least two hours after
the medication eliminates this problem.
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