Scientists have found that women who regularly have a small amount of alcohol are more likely to need cancer treatment in the future.
Researchers at the University of Oxford's cancer epidemiology unit analysed data on more than one million middle-aged women.
Publishing their findings in the Journal of the National Cancer Institute, they reveal that women who regularly have one or two alcoholic drinks per day face an increased risk of several cancers, including breast, liver and rectal cancer.
Sara Hiom, director of health information at Cancer Research UK, said that excessive alcohol consumption was already known to increase the risk of a number of cancers.
"This latest study shows that even relatively low levels of drinking increase a woman's risk," she added.
Writing in an accompanying editorial, Dr Michael Lauer and Dr Paul Sorlie, from the US National Heart, Lung and Blood Institute, said that the message from the study "could not be clearer" in relation to cancer risk.
"There is no level of alcohol consumption that can be considered safe," they advised.