Even if the researchers are off by half, it still means that 20% to 35% of all cancers could be avoided through lifestyle management. It’s also important to remember that cancer is primarily a disease of aging. Over 60% of all cancers in the U.S. happen after age 65. And, for many cancers, we already know that smoking, alcohol, and the pro-inflammatory metabolic environment created by obesity can increase cancer risk.

A study published in May in the Journal of the American Medical Association Oncology found that between 40 – 70% of cancer cases could be prevented if we changed our lifestyles by doing things like staying at a healthy weight, quitting smoking, reducing alcohol consumption and getting 2 ½ hours of exercise a week. “A large proportion of cancers are due to environmental factors and can be prevented by lifestyle modification,” the authors concluded.

Lifestyle gets blame for 70% to 90% of all cancers