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WESTPORT, CT (Reuters Health) Sept 05 - While several epidemiologic studies
involving Asian populations have suggested that phytoestrogen consumption may
lower the risk of breast cancer, levels of phytoestrogens commonly consumed
by non-Asian women in the USA do not appear to protect against the disease.
In a study reported in the September 1st issue of the American Journal of
Epidemiology, Dr. Pamela L. Horn-Ross from the Northern California Cancer
Center in Union City and colleagues compared the phytoestrogen intake of 1326
women who developed breast cancer with that of 1657 women randomly selected
from the general population.
The breast cancer group included African-American, Latina, and White US
women, 35 to 79 years of age, who were diagnosed between 1995 and 1998, the
authors report.
The researchers found no correlation between total phytoestrogen intake and
breast cancer risk: the odds ratio was 1.0 for the highest versus lowest
quartiles of intake.
This lack of association held true even after considering the woman's
menopausal status, ethnic background, and the type of phytoestrogen consumed.
Soy milk and soy burger consumption was linked to a reduced risk of breast
cancer, but only a small percentage of case and control subjects consumed
these products.
The highest average intake of phytoestrogens in the study population was
"only 3 mg/day, a level equivalent to less than one serving of tofu per
week," the investigators note. "In contrast, the average intake of
phytoestrogens in Asian countries has been estimated to range from about 15
to 30 mg/day," they point out.
Thus, it is possible that non-Asian US women
are not reaching a level of intake that may reduce the risk of breast cancer.
Am J Epidemiol 2001;154:434-
Ann's NOTE: I hate to have to point out that American women are just NOT getting enough phytoestrogens to get a positive effect. This article makes it sound like it is a fault of the phytoestrogens when in fact American women just do not get enough. Go out and eat vegetables, fruits, whole grains, little sugar, little salt, healthy fats-fish, flax, and olive oil. (organic if you can)
Then we can talk.
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