what is green tea?
Question:
Answers:
Green tea is a "true" tea (i.e. Camellia sinensis) that has undergone minimal oxidation during processing. Green tea is popular in mainland China, Taiwan, Hong Kong, Japan, and has recently become more popular in the West, which traditionally drinks black tea (a "true" tea made from leaves more heavily oxidized than the white, green, and oolong varieties).
Other Answers:
Green tea is a "true" tea that has undergone minimal oxidation during processing. Green tea is popular in mainland China, Taiwan, Hong Kong, Japan, and has recently become more popular in the West, which traditionally drinks black tea (a "true" tea made from leaves more heavily oxidized than the white, green, and oolong varieties).
Proponents of green tea note that its medicinal benefits have been described for over 1000 years. The Kissa Yojoki, or Book of Tea written by Zen priest Eisai in 1191, describes how drinking green tea can have a positive effect on the five vital organs, especially the heart. The book discusses tea’s medicinal qualities which include easing the effects of alcohol, acting as a stimulant, curing blotchiness, quenching thirst, eliminating indigestion, curing beriberi disease, preventing fatigue, and improving urinary and brain function. Part One also explains the shapes of tea plants, tea flowers and tea leaves and covers how to grow tea plants and process tea leaves. In Part Two, the book discusses the specific dosage and method required for individual physical ailments.
In more recent times, many studies have investigated a link between the consumption of green tea and a lower incidence of a range of cancers in populations, with mixed results. Green tea has been claimed to be useful for:
* Cognition
* Stopping certain neurodegenerative illnesses such as Alzheimers
* Preventing/ treating cancer
* Treating Arthritis
* Treating MS
* Preventing the degradation of cell membranes by neutralizing the spread of free radicals (which occurs during the process of oxidation)
* Increases fat oxidation (helps the body use fat as an energy source) and raises metabolism. [1]
* Lowering LDL cholesterol (in high doses in lab tests)
* Preventing lowered T-Cells due to HIV - In lab tests, EGCG, found in green tea, was found to prevent HIV from attacking T-Cells. However, it is not known if this has any effect on humans yet. [2]
The U.S. Food and Drug Administration (FDA) has rejected claims of health benefits for green tea. [3]
* "There is no credible scientific evidence that drinking green tea reduces the risk of heart disease".
* "FDA concludes there is no credible evidence to support qualified health claims for green tea or green tea extract and a reduction of a number of risk factors associated with CVD" (cardiovascular disease).
* The FDA previously has said that green tea likely does not reduce breast, prostate or any other type of cancer risk.
In a 2006 study published in The American Journal of Clinical Nutrition (Vol. 83, pp 355-361) showed that elderly Japanese people who drank more than 2 cups of green tea a day had a 50 percent lower chance of having cognitive impairment than those who drank less or who consumed other tested beverages.
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