But right behind tobacco is an unhealthy diet. According to CNN, bad diets are behind one-quarter of all cancer cases in developed countries.
If you're overweight, you've got a higher risk for breast cancer, intestinal cancer and kidney cancer. Especially if you smoke. In fact, scientists believe 5 percent of all cancers could be avoided if nobody was severely overweight. So, how does being overweight cause cancer? Well, fat cells store cancer -causing chemicals in the body, which raises the chance for cell mutation. Fat cells also speed up cell division. So, if any of your cells have mutated, they'll replicate much more quickly. And if it's cancer, that means it'll spread more quickly.
So, how can you protect yourself against cancer? Stay away from red meat, and processed meats, like ham and salami. Eat at least 5 servings of vegetables and fruit every day, and get at least 30 minutes of exercise. Work to get your body healthy   and you'll probably drop a couple of dress sizes, too.