Drinking a daily pint of beer or a large glass of wine increases your risk of bowel cancer by around 10 per cent - according to a new report by Cancer Research UK.
And the more you drink the more the risk increases.
Almost half a million people in 10 European countries were quizzed on their drinking habits as part of the EPIC study which is funded by Cancer Research UK, the Medical Research Council and other European agencies.
The report, published online in the International Journal of Cancer, found that people who drink 15 grams of alcohol a day - equivalent to about two units - have about a 10 per cent increased risk of bowel cancer.
Those who drank more than 30 grams of alcohol - equivalent to three to four units which is less than a couple of pints of strong lager - increased their bowel cancer risk by around 25 per cent.
Professor Tim Key, Cancer Research UK epidemiologist and deputy director of the cancer epidemiology unit in Oxford, said: "The research shows quite clearly that the more alcohol you drink the greater your risk of bowel cancer. The increase in risk is not large but it is important that people understand they can reduce their risk of a number of different cancers - including bowel cancer - by cutting down on alcohol."