A few clinical reports on green tea extracts suggest that this beverage may help decrease heart disease and prevent development of certain cancers. However, none of these reports have been verified in double blind well controlled studies. As far as weight loss is concerned, there is no evidence that drinking green tea can lead to better weight management.
The majority of green tea beverages contain caffeine, unless specifically stated. Normal green tea itself contains more caffeine than coffee. Other ingredients in green tea extracts include polyphenols, which are believed to have healing and anti oxidant properties. Many animal studies done in the Orient claim that these green tea extracts can decrease risk of heart disease, improve bone density, delay, or prevent cognitive problems, dental caries, and kidney stones. Asides from its beneficial effect on the heart, the other purported clinical benefits of green teas are not consistent nor do they occur in everyone.
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