Does being overweight cause breast cancer?

"Reports from both the International Agency for Research on Cancer and the World Cancer Research Fund conclude that there is convincing evidence that being obese or overweight causes breast cancer after menopause. And a 2006 study from the American Cancer Society Cancer Prevention Study-II found that gaining weight as an adult was an even more important risk factor than current weight for post-menopausal breast cancer. The study found that women who gained 60 or more pounds after age 18 had double the risk of being diagnosed with post-menopausal breast cancer compared to women who maintained their weight over the same time period. Other studies have reported similar findings." Continue reading the American Cancer Society Expert Voices blog here.