Maintain a healthy weight.
It goes without saying that weight plays a role in helping you stay healthy, but it may also affect your risk for breast cancer. There is substantial evidence to support the theory that obesity increases the risk of breast cancer in postmenopausal women. In fact, a 2006 study involving more than 87,000 female nurses showed that weight gain during adulthood (e.g. 20s, 30s, 40s) is a strong risk factor for postmenopausal breast cancer. The good news though is that maintaining a healthy weight through the years, along with losing weight (if overweight) after menopause, can do a lot to lower your risk.

Eat a healthy diet.
Maintaining an overall healthy diet not only offers your body the energy and nutrition it needs to function, but offers health benefits as well.

Several studies suggest that a healthy diet may play a role in reducing the risk of breast cancer. For example:

• A low-fat diet may help reduce the risk of breast cancer recurrence. In a 2005 study, women with a history of breast cancer, who got only about 25 percent of their daily calories from fat, had a lower risk of the cancer coming back.
• In 2006, the Women's Health Initiative Trial suggested that a low-fat diet may reduce the risk of first-time breast cancer for women whose diets are very high in fat to begin with.
• A 2007 National Cancer Institute study of middle-age women, who ate a wide range of fat, showed that a high-fat diet raises the risk of developing invasive breast cancer.
• Women who eat a lot of meat, particularly red or processed meats, may be more likely to develop breast cancer, according to a large study of British women published in April 2007.

Stay active.
Besides giving you more energy and helping you lose weight, physical activity also can help lower a woman's breast cancer risk. Two studies completed in February 2007 confirmed that six or more hours of activity each week can reduce the risk of invasive breast cancer for most women.

Changing your diet, losing weight and starting or ramping up your exercise routine can be hard. But with information, support and practical tips on how to make the changes, you can begin working toward a healthy weight that will help your body stay strong and healthy.

About the Writer
Marisa Weiss, MD, is president and founder of breastcancer.org. Visit the "Lower Your Risk" section at breastcancer.org to learn more about breast cancer risk.