Sarafino draws from the research and theory of many disciplines in order to show psychologists how psychology and health affect each other. "Health Psychology: Biopsychosocial Interactions, 8th Edition" is updated to include new research and data. New discussions are included on health care systems. Significant new information is also presented on prevention and intervention, especially for teens' risky behaviors. In addition, international examples are included to broaden the psychologist's view of health issues around the world and highlight what works in the field.