A woman pours hot water to make green tea at a traditional tea house in Boseong, about 397 km (246 miles) south of Seoul, September 23, 2007. Drinking green tea may reduce the risk of advanced prostate cancer, according to a study by researchers at Japan's National Cancer Center. (Han Jae-Ho/Reuters)TOKYO (Reuters) - Drinking green tea may reduce the risk ofadvanced prostate cancer, according to a study by researchersat Japan's National Cancer Center.
It said men who drank five or more cups a day might halvethe risk of developing advanced prostate cancer compared withthose who drank less than one cup a day.
"This does not mean that people who drink green tea areguaranteed to have reduced risk of advanced prostate cancer,"said Norie Kurahashi, a scientist who took part in the study.
"We are just presenting our results. But the study doespoint to the hope that green tea reduces the risk of advancedprostate cancer."
Prostate cancer is much less common among Asian men thanWestern men, and that may be partly due to the effects of thehigh consumption of green tea in Asia, the study said.
But it said further studies are needed to confirm thepreventive effects of green tea on prostate cancer, includingwell-designed clinical trials.
The study, published in the American Journal ofEpidemiology, compiled data from 50,000 men aged 40-69 over aperiod of up to 14 years from 1990.
British charity Cancer Research UK says on its Web sitethat a study of almost 20,000 Japanese men published in theBritish Journal of Cancer in 2006 found no relationship betweengreen tea and prostate cancer.
(Reporting by Chisa Fujioka, Editing by Michael Watson)
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