Further evidence has emerged of the link between alcohol consumption in women and an increased risk of breast cancer. According to a report from the World Cancer Research Fund, half a glass of wine or a small beer a day increases the risk of breast cancer. It also backs up research showing that regular intensive exercise can reduce the risk of the disease. Breast cancer is by far the most common cancer in women in the UK with one in eight women developing the disease during their lifetime. But scientists say they can’t explain why the cancer occurs in some people and not in others. There are numerous causes and lots of factors to take into account, including lifestyle, hormone levels and other medical conditions. Basically, it’s a complex picture and there’s no point focusing on one factor only. For a start, there are some factors you cannot control such as your sex, age, height, genes and when you started your periods. Cancer Research UK lists 18 different factors which could cause breast cancer to some degree. Alcohol is only one of them. It says there are ways women can lower their risk of breast cancer by focusing on factors they can control, like diet, weight and exercise.