http://www.cancer.org/docroot/mbc/content/MBC_6_2x_FAQ_Nutrition_and_Physical_Activity.asp
Cancer survivors often seek information and advice from their health care providers about food choices, physical activity, and dietary supplement use to improve their quality of life and survival. The best advice about diet and physical activity is that it is rarely a good idea to change diet or activity levels based on a single study or news report. The following questions and answers address common concerns of cancer survivors regarding diet and physical activity.