As the causes of breast cancer aren't fully understood, at the moment it's not possible to know if it can be prevented.
If you're at increased risk of developing the condition, some treatments are available to reduce the risk.
Studies have looked at the link between breast cancer and diet. Although there are no definite conclusions, there are benefits for women who:
maintain a healthy weight
exercise regularly
have a low intake of saturated fat and alcohol
It's been suggested that regular exercise can reduce your risk of breast cancer by as much as a third. Regular exercise and a healthy lifestyle can also improve the outlook for people affected by breast cancer.
If you've been through the menopause, it's particularly important that you're not overweight or obese.
This is because being overweight or obese causes more oestrogen to be produced, which can increase the risk of breast cancer.
"Four million people died in 2015 as a result of being too tubby, struck by cancer, heart disease, diabetes and other killer conditions," reports The Sun. This is based on a global study that looked at how the proportion of people who are overweight and obese has changed over time. This was determined by recording body mass index (BMI), where a BMI of 25-29.9 means being overweight and 30 or above is being obese. Researchers then assessed the link between having an unhealthy BMI and health outcomes including cardiovascular disease, diabetes and cancer. It found that, despite public health efforts, obesity is on the rise in almost every country and in both adults and children. Prevalence has doubled in most countries over the past 30 years. Researchers also estimated that having a high BMI accounted for 4 million deaths globally, 40% of which occurred in people who were overweight but not yet obese. This demonstrates that being overweight may almost be as risky to health a...