Breast cancer is more prevalent in women eating high fat, low fibre diets.
Phytooestrogens, weak oestrogens found in the high fibre diets of Asian women, are reported to protect against breast cancer development and low urinary excretion of phytooestrogens has been reported in Finnish and American postmenopausal breast cancer patients compared to control women. Statistical analysis was by two sample t-test. Healthy control women had significantly higher serum levels of daidzein and genistein than either previously treated or new breast cancer cases.