green tea2016-12-19T04:30:55+00:00

green tea

green tea beverage image from New Medical Terms

green tea beverage


A beverage prepared from the leaves of an eastern Asian evergreen shrub, Camellia sinensis, which is believed to have a carcinoprotective effect greater than that of black tea*; both have epigallocatechin gallate–EGCG, an antioxidant allegedly responsible for the protective effect. Green tea (GT) may also prevent spiking of glucose in diabetic patients by inhibiting alpha amylase, an effect attributed to EGCG.

*Black tea (BT) is produced from GT by a fermentation process.

GT is popular among Asians, and central to certain cultural rituals–e.g., the Japanese tea ceremony; GT was believed to be of some benefit for stomach cancer, a belief now discounted NEJM 2001; 344:632-6

Some authors cite GT as the explanation for the lower incidence of cardiovascular disease among Asians, despite the greater number of smokers in this population Bauer E. Sumpio et al., “The ‘Asian paradox’, and Cardiovascular Disease,” J Am Coll Surgeons, May 1, 2006 


Molecular Nutrition & Food Research, 2012; 56(11): 1,647


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