A glass of wine a day linked to an increase in the risk of breast cancer whilst exercise lowers the risk for women

A new report from the World Cancer Research Fund, part of the Continuous Update Project (CUP) analysed 119 studies, including data on 12 million women worldwide and found strong evidence that drinking the equivalent of a small glass of wine or beer a day (about 10 grams of alcohol) increases pre menopausal breast cancer risk by 5% and post menopausal breast cancer risk by 9%. 

The same report concluded that pre menopausal women who were the most physically active  (participating in vigorous exercise including running and cycling) had a 17% lower risk of developing breast cancer and post menopausal women had a 10% lower risk of developing breast cancer compared to those who were the least active.  Overall moderate activity, including walking or gardening was linked to a 13% lower risk of developing breast cancer.

"It can be confusing with single studies when the findings get swept back and forth," said Anne Mc Tiernan MD, PhD, Lead author of the report.  "With this comprehensive and up to date report the evidence is clear, a physically active lifestyle, maintaining a healthy weight throughout life and limiting alcohol - these are all steps women can take to lower their risk."

About:  World Cancer Research Fund is a registered charity dedicated to the prevention of cancer.  The charity is focused on a Continuous Update Project which consistently analyses the latest research delivering trustworthy cancer prevention advice based on the most up to date evidence.