The Dietary Guidelines for Americans provides advice on what to eat and drink to meet nutrient needs, promote health, and prevent disease. It is developed and written for a professional audience, including policymakers, healthcare providers, nutrition educators, and Federal nutrition program operators. The U.S. Departments of Agriculture (USDA) and Health and Human Services (HHS) work together to update and release the Dietary Guidelines for Americans (Dietary Guidelines) every five years. Each edition of the Dietary Guidelines reflects the current body of nutrition science.