Drinking as little as 3 units of alcohol/day increases your risk of developing many types of cancer incl cancers of the mouth, throat, oesophagus (the pipe that goes from your mouth to your stomach), liver, breast and bowel. If you smoke and drink, you're 50 times more likely to get some types of cancer than someone who doesn't. All types of alcoholic drinks increase the risk of cancer, even red wine.
Attribution: BUPA