Intake of phytoestrogen foods and supplements among women recently diagnosed with breast cancer in Ontario, Canada

摘要: Phytoestrogens are found in foods such as soy (isoflavones) and flaxseed (lignans), certain botanical supplements. Their role estrogen receptor positive (ER+) breast cancer recurrence treatment is controversial, it unknown how this affects intake among patients. The Ontario Cancer Registry was used to identify 417 population-based cases (mean time from diagnosis 57 days). A questionnaire mailed determine of phytoestrogen supplements the last 2 mo, changes since differences by ER tumor status or hormonal treatment. Of 278 (67%) respondents, 56% consumed foods, 39% isoflavone-rich (tofu, soybeans, milk, nuts), 70% ate lignan-rich including (33%). Only flaxseed, bread were commonly more than once/wk. Few patients (4%) took isoflavone (soy, red clover, kudzu, licorice, isoflavones) lignan/flaxseed Since diagnosis, 17% started stopped (most stopped); prevalent those receiving (20%; 95% confidence interval (CI): 14, 26) not (6%; CI: 1, 12). No other observed. Research needed confirm explore influencing factors.