Recent research suggests that as little as one alcoholic drink per day can increase breast cancer risk, while exercise and a healthful diet lowers the risk. The new report, conducted by the American Institute for Cancer Research (AICR), in collaboration with the World Cancer Research Fund, examined several risk factors for breast cancer, including diet, alcohol and weight. According to the new report, as little as 10 grams of alcohol a day—the amount of a small glass of wine or beer—raises the risk of premenopausal breast cancer by 5%. The same amount of alcohol also raises the risk of postmenopausal breast cancer, which is the most common form, by 9%. Ten grams of alcohol is less than the “standard” drink size, which is 14 grams.