Up to a third of breast cancer cases in Western countries could be avoided if women ate less and exercised more, researchers at a breast cancer conference said.
Breast cancer is the most common cancer in women. In Europe, there were about 421,000 new cases and nearly 90,000 deaths in 2008, the latest available figures. The United States last year saw more than 190,000 new cases and 40,000 deaths.
A woman’s lifetime chance of getting breast cancer is about one in eight. Obese women are up to 60% more likely to develop any cancer than normal-weight women, according to a 2006 study by British researchers.
Many breast cancers are fueled by estrogen, a hormone produced in fat tissue. So experts suspect that the fatter a woman is, the more estrogen she’s likely to produce, which could in turn spark breast cancer. Even in slim women, exercise can help reduce the cancer risk by converting more of the body’s fat into muscle.
[Source]
Chapter: Cancer :: 5 September 2010
