It purported to contain antioxidants that reduce the risk of some cancers, particularly those of the gastrointestinal tract. Claims have also been made that it can lower cholesterol and triglyceride levels and lower the risk of cardiovascular disease. It originates from the same plant as black tea, but the leaves are prepared differently. Unlike black tea, the leaves are steamed to prevent oxidation of the active agents.
Green tea is very popular in China, Japan, and India.
People generally drink 3 cups per day to promote health. The taste of green tea is very different from black tea, which has limited its popularity in the western world. It is available in grocery stores and sold in tea bags or as dried herb. There are a number of retrospective studies performed in Japan and China that indicate individuals who drink green tea have a lower incidence of cancer. There are also claims that those who develop cancer tend to do so at an older age.