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Sunday, June 16, 2013

Tea

Tea is an aromatic beverage commonly prepared by pouring hot or boiling water over cured leaves of the tea plant, Camellia sinensis.[3] After water, tea is the most widely consumed beverage in the world.[4] It has a cooling, slightly bitter, and astringent flavour that many people enjoy.[5]
Tea likely originated in China during the Shang Dynasty as a medicinal drink.[6] It was first introduced to Portuguese priests and merchants in China during the 16th century.[7] Drinking tea became popular in Britain during the 17th century. The British introduced it to India, in order to compete with the Chinese monopoly on the product.[8]
Tea has been historically promoted for having a variety of positive  health benefits. Recent human studies suggest that green tea may help reduce the risk of cardiovascular disease and some forms of cancer, promote oral health, reduce blood pressure, help with weight control, improve antibacterial and antivirasic activity, provide protection from solar ultraviolet light,[9] increase bone mineral density, and have "anti-fibrotic properties, and neuroprotective power."[10] Additional research is needed to "fully understand its contributions to human health, and advise its regular consumption in Western diets."[10]
Tea catechins have known anti-inflammatory and neuroprotective activities, help to regulate food intake, and have an affinity for cannabinoid receptors, which may suppress pain and nausea, and provide calming effects.[11]
Consumption of green tea is associated with a lower risk of diseases that cause functional disability, such as “stroke, cognitive impairment, and osteoporosis” in the elderly.[12][13]
Tea contains L-theanine, and its consumption is strongly associated with a calm but alert and focused, relatively productive (alpha wave dominant), mental state in humans. This mental state is also common to meditative practice.[14]
The phrase "herbal tea" usually refers to infusions of fruit or herbs made without the tea plant, such as rosehip tea, chamomile tea, or rooibos tea. Alternative phrases for this are tisane or herbal infusion, both bearing an implied contrast with "tea" as it is construed here.

  SOURCE: From Wikipedia, the free encyclopedia
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