There is no evidence that you can prevent prostate cancer. But you may be able to lower your risk.
A diet that helps maintain a healthy weight may reduce your risk for prostate cancer. The American Cancer Society recommends:
Limiting high-fat foods
Cutting back on red meats, especially processed meats such as hot dogs, bologna, and certain lunch meats
Eating five or more servings of fruits and vegetables each day
Healthy food choices also include bread, cereals, rice, pasta, and beans...