If you want to diminish your risk of breast cancer, cut way back on the booze. Drinking alcohol, even moderately, can increase your cancer risk. “Even as little as one drink per day seems to be associated with breast cancer, and the more you drink, the higher your risk,” says Halle Moore, MD, a breast cancer oncologist at the Cleveland Clinic. Three or more drinks per week boost the risk of breast cancer recurrence by 30 percent, and overweight and postmenopausal women may be particularly at risk. According to Dr. Dietz, what matters most is the cumulative amount of alcohol you drink over a lifetime, so whether you have a glass of wine every night with dinner or a few cocktails on weekends, the effect is still the same. To keep your breast cancer risk low, cap your cocktails at one or two a week, says Dr. Dietz.