"What you eat and how much you consume makes a difference when it comes to cancer," says Colleen Doyle, R.D., director of nutrition and physical activity for the American Cancer Society. The first step: Limit your intake of sweets and unhealthy fats. Focus on the term "occasional treat," with the stress on occasional. Step two: Incorporate the following foods into your everyday meals and snacks; pick at least two a day for a week's worth of protection. They're nutritional powerhouses and have all shown promise in the fight against cancer.
Serving = 1 cup soy milk, 4 ounces tofu, or 1/2 cup shelled edamame
Soy may lower the risk for breast and prostate cancers. You'll get more benefit from whole soy (edamame, tofu and soy milk) than from foods with processed soy protein (energy bars), says Alice Bender, R.D., a dietician with the American Institute for Cancer Research. One caution: Some women with breast cancer should avoid soy—talk with your doctor.