green tea

Definition / meaning of green tea

Tea derived from the dried leaves of the plant Camellia sinensis with potential antioxidant, chemopreventive, and lipid-lowering activities. Green tea contains polyphenols that may be responsible for its chemopreventive effect. The polyphenol fraction contains mainly epigallocatechin-3-gallate (EGCG) and other catechins, such as epicatechin (EC), gallocatechin gallate (GCG), epigallocatechin (EGC), and epicatechin gallate (ECG). Green tea polyphenols act as antioxidants and free radical scavengers and may affect enzymes involved in cellular replication and tumor angiogenesis by modulating angiogenic factors, such as vascular endothelial growth factor (VEGF).

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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