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Flaxseed May Fight Breast Cancer In Postmenopausal Women.(Brief Article)
2001 SEP 13 - (NewsRx.com & NewsRx.net) -- Flaxseed, sold in health food stores as a dietary supplement, may protect postmenopausal women against breast cancer, according to a new study by researchers at the University of Minnesota in St. Paul.
While the study appears promising, more long-term studies are needed before recommending the supplement to women in general, the researchers caution. They presented their findings on August 29, 2001, at the 222nd national meeting of the American Chemical Society.
Previous studies in cell and animal models of breast cancer have suggested that flaxseed may reduce chemical markers associated with an increased risk for the disease. The current study is believed to be the first to show that flax may be protective against breast cancer in humans, says Joanne Slavin, PhD, RD, lead investigator in the study and a nutritionist at the university's department of food science and nutrition.
Slavin and her associates studied 28 postmenopausal nuns in a convent in central Minnesota, chosen primarily because of their strict dietary practices. The volunteers were given daily dietary supplements of either 0, 5, or 10 grams of ground flaxseed for seven week cycles over the course of a year.
Consumption of 5 or 10 grams of flax significantly decreased blood levels of certain types of estrogen that are characteristic of postmenopausal women. Since previous studies have shown that increased levels of these estrogens (estrone sulfate and estradiol) may increase a woman's risk of developing breast cancer, reducing levels of these hormones is thought to be protective against breast cancer, according to the researchers.
The exact mechanism by which flaxseed exerts its effect is ...
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