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NCI Dictionary of Cancer Terms

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Polyphenon E  listen  (PAH-lee-FEE-nun ...)

  A mixture that is prepared from the leaves of the Camellia sinensis plant. It contains substances called catechins, which are antioxidants. Antioxidants help protect cells from damage caused by certain chemicals that may increase the risk of cancer and other diseases. Polyphenon E is being studied in the prevention of cancer and other diseases. It is a trademarked product of Mitsui Norin Co., Ltd.