NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,199 terms related to cancer and medicine.

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green tea extract
(green tee EK-strakt)
A mixture that is prepared from the leaves of the Camellia sinensis plant. It contains substances called flavonoids and polyphenols, which are antioxidants. Antioxidants help protect cells from damage caused by certain chemicals that may increase the risk of cancer and other diseases. Green tea extract may be taken to treat certain conditions. It is also being studied in the prevention of cancer and other diseases.