This book provides an overview of the field and focuses on the role of the Federal Government in determining nutrition policy and practice. Beginning with a review of the definition and principles of public health, the book examines trends in the US population and nutritional epidemiology. It considers programs to help reduce disparities in the prevalence of diet-related chronic diseases among various populations, as well as a detailed chapter on obesity with discussions on global impact and cost, pediatric obesity, and the impact of socioeconomic status and ethnicity. Specific information is included on breastfeeding mothers, HIV/AIDS, and prison inmates.