Can nutritional supplements lower cancer risk or the risk of cancer coming back?
There is no evidence at this time that dietary supplements can lower the chance of cancer coming back or improve survival.
There is strong evidence that a diet rich in vegetables, fruits, and other plant-based foods may reduce the risk of some types of cancer. And some recent studies suggest there may be a helpful effect on recurrence or survival for breast, prostate, and ovarian cancers. But there is no evidence at this time that supplements can provide these benefits. Many healthful compounds are found in vegetables and fruits, and it’s likely that these compounds work together to create these helpful effects. Food is the best source of vitamins and minerals.