Monday, December 11, 2006

Green tea, breast cancer, and estrogen levels

In this study, a group of University of Southern California medical researchers who had previously "provided the first set of human evidence that breast cancer risk is significantly inversely associated with tea intake, largely confined to intake of green tea," investigated one possible reason for the lower incidence of breast cancer among green tea drinkers: estrogen levels in the blood.


The study found that postmenopausal women who drank green tea regularly had a statistically significant lower (13%) level of estrogen in their bloodstream than women who drank tea irregularly or not at all. (Women who drank black tea regularly had 19% higher estrogen levels.)


—Mellow Monk


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