Dietary fiber cuts breast cancer risk
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By David Liu
A case-control study released in the May 4, 2011 issue of European Journal of Clinical Nutrition suggests that eating lots of dietary fiber may reduce breast cancer risk.
C-X Zhang of the Chinese University of Hong Kong in Hong Kong, China and colleagues found there was an inverse association between intake of dietary fiber and risk of breast cancer among the study subjects after analysing dietary data obtained through face-to-face interviews from 438 women with breast cancer recruited from June 2007 through Aug 2008 and 438 controls without the disease.
Those whose intake of total dietary fiber was in the highest quartile were 69 percent less likely to develop breast cancer, compared with those who had their intakes in the lowest quartile.
Comparing the highest intake to the lowest intake, the reduction in the risk of breast cancer was 27 percent for soy fiber,52 percent for vegetable fiber and 46 percent for fruit fiber.
The inverse association was observed in ER+, ER-, PR+, ERR+PR and ER-PR+ breast cancers.
However, no association was found between cereal fiber intake and breast cancer risk.
The researchers concluded that "consumption of total dietary fiber and fiber from vegetable and fruit was inversely associated with breast cancer risk. These inverse associations were more prominent in some subtypes of ER and PR breast cancers."
Dr. T. Colin Campbell, distinguished nutrition professor at Cornell University reported in his book China Study that rural Chinese people are at low risk for various cancers and epidemiological data suggest the low risk has something to do with their plant-based diet.
Recently, media reports say incidence of cancers in the developed regions in China has been on the rise. The change in people's diet and lifestyle is believed to be the cause for the increased cancer risk.
Breast cancer is diagnosed in more than 175,000 women each year in the United States and the disease kills about 50,000 women each year in the country, according to the National Cancer Institute.
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