Drinking Green Tea Offers No Protection Against Breast Cancer

by VR Sreeraman on  October 29, 2010 at 12:49 PM Cancer News
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A study of data from approximately 54,000 women has found that green tea does not protect against breast cancer.

Motoki Iwasaki, from the National Cancer Center, Tokyo, worked with a team of researchers to carry out the study.
 Drinking Green Tea Offers No Protection Against Breast Cancer
Drinking Green Tea Offers No Protection Against Breast Cancer

He said, "Although in vitro and animal-based studies have suggested that green tea may have beneficial protective effects against breast cancer, results from human studies have been inconclusive.

Our large-scale, population-based prospective cohort study is one of the first to include a wide range of tea intakes; women who drank green tea less than 1 cup per week to those who drank 10 or more cups per day. It found no overall association between green tea intake and the risk of breast cancer".

Tea intake was assessed by questionnaire, once at the beginning of the study and then again five years later. Cancer incidence was assessed by notification from major local hospitals in the study area and data linkage with population-based cancer registries.

Approximately 12pc of women drank green tea less than 1 cup per week while 27pc drank 5 or more cups per day.

Speaking about the survey, Iwasaki said, "The other major strength of the present study was its prospective design, in which information was collected before the subsequent diagnosis of breast cancer, thereby avoiding the exposure recall bias inherent to case-control studies.

Drinking green tea as a beverage is unlikely to reduce the risk of breast cancer regardless of green tea type and number of cups".

The study has been published in BioMed Central's open access journal Breast Cancer Research.

Source: ANI

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