What does this report say?
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.
After analysing more than 100 studies that examined the medical history of 12 million women, the report backs up current advice to be aware of alcohol consumption.
The report found evidence that drinking an extra small glass of wine every day (10g of alcohol) increases a woman's risk of breast cancer after the menopause by 9%.
What does that really mean?
It means that in a group of 100 women, around 13 would be likely to develop breast cancer anyway.
And if they all drank an additional small glass of wine every day, one extra case might develop among the original group.