After treatment, follow the diet given to you by your doctor. This diet includes lean meats, lean poultry, and fish. Stay away from full-fat dairy products. Eat foods high in fiber, such as fruits, vegetables, and whole grains. Also eat healthy fats, such as those found in fish and olive oil. Don't eat unhealthy fats, such as those found in desserts and fried foods. Also don't eat refined carbohydrates or sugar. Stay at a healthy weight and get regular physical activity.