Anyone who has received a diagnosis of cancer should receive specialized nutritional advice from an appropriately trained professional. Once treatment has been completed, if you are able to do so (and unless otherwise advised), aim to follow our cancer prevention recommendations for diet, physical activity and healthy weight maintenance.
There is growing evidence that physical activity and other measures that help us to maintain a healthy weight, such as a balanced diet, may help to prevent cancer recurrence, particularly for breast cancer. However, the evidence is not yet clear enough to be able to make any specific recommendations for cancer survivors in general, or for those who are survivors of any specific form of cancer. – American Institute of Cancer Research (http://www.aicr.org/)