The health promoting effects of green tea are attributed to the rich antioxidant polyphenol content of its leaves (flavonols & catechins), making up c. 30% dry weight of a tea leaf, and exhibiting biochemical and pharmacological activities (Siddiqui et al. 2006). Recently, many of these beneficial effects were traced back to the most abundant catechin, EGCG (Wolfram 2007).White tea differs from green tea by only using buds or first leaves. Green tea is rich in catechins. Black tea contains high levels of bisflavanol, theaflavin, and thearubigin, whereas white tea possesses large amounts of epigallocatechin-3-gallate or EGCG, epicatechin, and methylxanthine (Zhao et al. 2013).
And just like a good wine, geographic location, soil and growing conditions play a role in tea quality, too. Tea leaves are heated and dried to inactivate enzymes, thus preserving constituents until we come along to make a brew by simply adding hot water.
The convenience of tea bags comes for the price of
much reduced quality: tea bags usually contain shredded bits of tea
hardly deserving the name. I generally avoid tea bags. Loose leaf tea
just tastes so much better. As a rule of thumb, the bigger the leaf, the
better and more tasty the tea. Tea bags either contain chemicals
(epichlorohydrin) to prevent the paper from disintegrating in water, or
are made from plastic including potentially harmful substances. Both are
not the best choice. No need to ingest anything that doesn’t naturally
belong in the body. Exercising that control whenever you have it makes
not only sense, but also for a much healthier body.
Three billion kilograms of tea are grown and
processed worldwide annually (Ohsaki Study 2006). People in about 30
countries are the main tea consumers. Green tea, specifically, is most
commonly used in Asia (c. 20%), whereas Westerners prefer black tea (c.
78%).
So why go green?
Green tea is traditionally associated with various
health benefits, and science, mostly since 1995, begins to confirm its
beneficial effects on inflammation, arthritis, bacterial and viral growth inhibition, various cancers, eliminating toxins,
the cardiovascular system, gums and teeth, the nervous system, and
others. There are over 12.000 published (peer reviewed) articles on
green tea. The search ‘green tea benefits’ on Web of Science returned
711 papers, a few of which form the basis of this article.
Tea variety and preparation method (at the growers
and at home) also matter in bringing out the beneficial influence green
tea bestows on our body (Shishikura & Khokhar 2005), as does
bioavailability: we can ingest something, yet is it readily available to
our cells in that form? If yes, it’s bioavailable, i.e. the body can
use it straight away. If not, it may go right through without affecting
anything. This is the reason why some supplements do not work – they are
not presented in the right (bioavailable) form to the body. In green
tea, bioavailability of catechins is directly proportional to the amount
consumed (Reygaert 2014).
The following lists some of the benefits you may gain when regularly drinking green tea (multiple cups a day).
Read More : http://wakeup-world.com/2015/05/01/10-health-benefits-of-green-tea/
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