What are the best supplements to take to prevent cancer from reoccurring?

Not shown to help: Supplements have not been shown to prevent cancer from recurring. In fact, some supplements like vitamins c and e and beta-carotene seem to help cancers grow. Talk to your doctor about what you can do to reduce your risk. Usually the best course of action is to eat a healthy diet, be as physically active as you can, and follow your doctor's advice about check-ups.