8. Spice up your life. Turmeric, an ingredient in curry powder, contains the powerful phytochemical curcumin, which preliminary studies have shown fights inflammation and inhibits tumor cell growth, says Bharat B. Aggarwal, Ph.D, a professor of cancer research at the University of Texas M.D. Anderson Cancer Center in Houston. Statistics comparing breast cancer incidence in Americans and Indians, who consume a curry-rich diet, is also telling: Recent data counts 101 new cases per 100,000 people in the U.S., versus just 19 per 100,000 in Indians. If you don't like this spice, Aggarwal suggests a 500-milligram curcumin supplement (which you can buy online or at a health food store). If you're on a blood thinner, such as Coumadin, beware of this supplement since curcumin further reduces clot formation.
9. Breastfeed your babies. An analysis of 47 studies in the journal the Lancet found that women who nursed for at least 15 months over their lifetime reduced their breast cancer risk by about 4%. The reason? "It could be because breastfeeding reduces a woman's total number of menstrual cycles—and that means less exposure to estrogen," says Lisa C. Richardson, M.D., a medical officer at the Centers for Disease Control and Prevention. "It's a small benefit—but it is a benefit."
10. Study your family tree. "Knowing your history on both your mother's and father's side is very important," says Dr. Weiss. "If you find out you're at increased risk—meaning you have two or more close relatives who have had breast and/or ovarian cancer, especially if the cancer was diagnosed before age 50—there are definite measures you can take." Some women get tested to find out if they have mutated BRCA1 and BRCA2 genes; others take the drug tamoxifen; and others (if risk is very high) have surgery to remove the breasts and ovaries.