This book focuses on the role of natural supplements in cancer prevention and therapy. The first section covers cancer epidemiology, cancer statistics and current therapies and potential toxicities involved with existing cancer drugs. The second section discusses the pathophysiology of cancer including mechanistic and molecular aspects of cancer biology, etiology of breast cancer, lung cancer, prostate cancer, tobacco and cancer, gastrointestinal tract cancers and various risk factors related to obesity, exercise and aging. The third section covers phytopharmaceuticals and focuses on cancer health risk factors and the protective abilities of the various natural products.