To prevent bladder cancer, your best bet is to avoid possible carcinogens, or cancer-causing substances. For starters, don't smoke. Eat smoked or cured meats only occasionally and prepare fresh rather than processed foods.
Research also suggests that there is a reduced incidence of bladder cancer among people with adequate vitamin B-6, beta-carotene, and selenium in their diets. If you work around carcinogenic chemicals, follow safety guidelines to avoid undue exposure. And if you feel you may be at risk for bladder cancer, arrange regular screenings with your doctor to ensure early detection.