Just one alcohol-containing beverage a day — less than a standard drink — is sufficient to increase a woman's risk of breast cancer, according to a new report by the American Institute for Cancer Research (AICR) and the World Cancer Research Fund (WCRF). The report offered some good news too, however. Vigorous exercise and certain types of food reduce the risk of cancer in both pre- and postmenopausal women. “It can be confusing with single studies when the findings get swept back and forth,” Dr. Anne McTiernan, a lead author of the report and a cancer prevention expert at Seattle's Fred Hutchinson Cancer Research Center, said in a press release. “With this comprehensive and up-to-date report, the evidence is clear: Having a physically active lifestyle, maintaining a healthy weight throughout life and limiting alcohol – these are all steps women can take to lower their risk.” The report “Diet, Nutrition, Physical Activity and Breast Cancer,” gathered published evidence of how these factors affect breast cancer. The data comprised 119 studies, including data from 12 million women, 260,000 of which had breast cancer. Data analyses revealed that a small drink of wine or beer — containing about 10 grams of alcohol — increased the risk of breast cancer by 5 percent in pre-menopausal, and by 9 percent in post-menopausal women. This amount of alcohol is lower than that of a U.S. standard drink, which contains 14 grams of alcohol.