Coffee 2 Tea

The study, which began in 1994, followed 40,530 adults, ranging in age from 40 to 79, in northeastern Japan for up to 11 years. Within this region, 80% of the population drinks green tea with more than half consuming at least 3 cups a day.

Compared with participants who consumed less than 1 cup of green tea per day, those drinking 5 or more cups a day had a significantly lower risk of death from all causes and, specifically, risk of death from CVD, with women receiving even stronger protection than men:

Only weak or neutral relationships were seen between black tea or oolong tea and all-cause or CVD mortality.

While this study found no cancer-preventive benefit from drinking green tea, other large studies, including a meta-analysis of 13 studies published July 2006 in Carcinogenesis (Sun CL et al), suggest that green tea reduces risk of breast cancer. In this study, compared to women who did not drink green tea, those consuming the most green tea were 22% less likely to develop breast cancer.

Often in studies, the effects of a certain health-promoting behavior are likely to be confounded by the fact that those who try to follow a healthy lifestyle practice a variety of healthy habits. In this study, however, since green tea is the most commonly consumed beverage in Japan, it is unlikely that study participants were choosing to drink green tea primarily for their health, and thus also unlikely that the significant drop in risk of death due to all causes and CVD was due to other habits related to health consciousness.

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Tags: Black Tea, Green Tea, Green Tea Benefits, Oolong tea