Drinking as little as one alcoholic beverage a day raises the risk for breast cancer. The increase is slight but with three drinks per day the risk rises significantly and in direct proportion to the amount of alcohol consumed.
Beer, wine, spirits -- the type of drink makes no difference. It is the alcohol that increases breast cancer risk, presumably by raising the level of circulating estrogen. And, of course, the calories in drinks also increase risk by contributing to weight gain.
This doesn't mean you need to give up drinking entirely. We do get some health-promoting antioxidants from alcoholic beverages, particularly from red wine and dark beers.
It is believed that the B vitamin, folate, counteracts some of the negative effects of alcohol, making it a good idea to eat folate-rich foods when you drink.
So don't hesitate to celebrate with a glass of champagne. But limit your weekly consumption of alcoholic beverages to fewer than seven.
1 drink = 12 ounces of beer 5 ounces of wine 1.5 ounces of 80-proof liquor
American Cancer Society Guidelines on Nutrition and Physical Activity for Cancer Prevention: Reducing the Risk of Cancer with Healthy Food Choices and Physical Activity LH Kushi, T Byers, C Doyle, EV Bandera, M McCullough, T Gansler, KS Andrews, MJ Thun CA A Cancer Journal for Clinicians 2006