If you drink alcohol, limit your consumption. Genes determine most of your cancer risk. Even the best diet can't do much to prevent those cancers-for example, hereditary breast or colon cancer. In these cases, a healthy diet can help your DNA repair itself, which can prevent cancer even if you have a genetic predisposition. It's impossible to eat five daily servings of fruits and vegetables.
Experts suggest three vegetable and two fruit servings each day.
Have a piece of fruit with breakfast. Have a vegetable or salad with lunch and another at dinner. Between meals, snack on fruits or vegetables-an apple, orange, banana, carrot, celery stalk, cherry tomatoes or sweet green or red pepper slices. Start with one. Move on to two.