This book discusses the role of nutrients and vitamins in cancer prevention and treatment. Basic and clinical scientists from different regions of the world have contributed to this volume. The incidence of cancer is on the rise internationally and many of these cancers appear to be attributable to diet, lifestyle, and environmentally related factors. In recent years, many cancer causing substances and cancer protective agents which are associated with these factors have been identified and extensively tested in experimental models. This work also focuses on newer conceptual ideas that have emerged regarding the functions of nutrients on cellular and molecular levels.