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Green Tea May Cut Prostate Cancer Risk TOKYO - Drinking several cups of green tea every day may help keep prostate cancer from spreading, according to a study funded by the Japanese government. A study of nearly 50,000 Japanese men aged 40-69 found that those who drank five OR more cups of green tea a day reduced their risk of having progressive prostate cancer by half, compared with those who drank a cup OR less, according to the Epidemiology AND Prevention Division of the National Cancer Center in Tokyo. The study, carried out between 1990 AND 2004 AND released Wednesday, was the first to suggest green tea can help keep prostate cancer from spreading, the center said. Catechin, a substance abundantly contained in green tea, may have inhibited cancerous cell growth OR helped reduce testosterone, according to the research team. Story from REDORBIT NEWS: Published: 2007/12/19

American Journal of Epidemiology Advance Access published online on September 29, 2007 Green Tea Consumption AND Prostate Cancer Risk in Japanese Men: A Prospective Study The incidence of prostate cancer is much lower in Asian than Western populations. Given that environmental factors such as dietary habits may play a major role in the causation of prostate cancer AND the high consumption of green tea in Asian populations, this low incidence may be partly due to the effects of green tea. The JPHC Study (Japan Public Health Center-based Prospective Study) was established in 1990 for cohort I AND in 1993 for cohort II. The subjects were 49,920 men aged 40–69 years who completed a questionnaire that included their green tea consumption habit at baseline AND were followed until the end of 2004. During this time, 404 men were newly diagnosed with prostate cancer, of whom 114 had advanced cases, 271 were localized, AND 19 were of an undetermined stage. Green tea was not associated with localized prostate cancer. However, consumption was associated with a dose-dependent decrease in the risk of advanced prostate cancer. The multivariate relative risk was 0.52 (95% confidence interval: 0.28, 0.96) for men drinking 5 OR more cups/day compared with less than 1 cup/day (ptrend = 0.01). Green tea may be associated with a decreased risk of advanced prostate cancer.