If you're not already eating your five servings of fruits and vegetables a day then you may want to start, especially if you're a smoker.

New research has found that people who ate three servings of vegetables a day were 1.6 times less likely to develop lung cancer than those who didn't eat three servings. People who ate three or more servings of fruit were one-fold less likely to develop lung cancer. Researchers think that this is due to the fact that fruits and vegetables contain flavonoids, which have antioxidant and anti-inflammatory properties that stop the development of blood vessels that feed tumors.

Now that's not to say that if you are a smoker that eating fruits and vegetables can enable you to continue smoking and still be protected against lung cancer. The absolute best defense against lung cancer (not to mention a whole slough of other health risks associated with smoking) is to quit smoking altogether.

Source