Research of Green Tea
Much of the research on green tea has centered on the active ingredients called polyphenols, powerful antioxidant chemicals. Tannins, large polyphenol molecules, form the bulk of the active ingredients in green tea, with catechins the dominant category, comprising about 90%. One catechin in particular stands out. Epigallo-catechin- 3 gallate
(EGCG), which typically makes up about 50% of the catechin content, appears to be the most beneficial ingredient. As an antioxidant, EGCG is about 100 times more potent than vitamin C and 25 times more potent than vitamin E.
Green tea brims with cancer-fighters. Green tea antioxidants block cancer by preventing damage to cell DNA, and studies are revealing that green tea has powerful effects in reducing the rate and severity of many types of cancer, including breast, skin, stomach, lung, colon, prostate, and possibly even skin cancer. In addition, it prevents metastasis from an original site in the skin, stomach, small intestine, liver or lung.
In particular, green tea may benefit prostate cancer. The prostate cancer mortality rate among Japanese men, who habitually drink four to six cups of green tea a day, is considerably lower than that for Western men. A study from Kobe University in Japan found that mice fed green tea extract and subjected to prostate cancer were less likely to develop the disease. A recent report from the Mayo Clinic stated that green tea even kills some prostate cancer cells.
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