This book uses the most recently available data from the National Health and Nutrition Examination Survey (NHANES 1999-2004) to provide an up-to-date and comprehensive picture of the diets of Food Stamp Program (FSP) participants in three age groups -- children 1-18 years old, adults 19-59 years old, and older adults 60 years and older. The book examines nutrient intakes, diet quality, and food choices. Data are presented for FSP participants and two groups of nonparticipants -- those who were income-eligible for the FSP but did not participate, and higher-income individuals who were not eligible for the FSP.