What is classified as a nutrient-dense food according to the dietary guidelines for americans?

A nutrient-dense food is defined by the Dietary Guidelines for Americans as one that provides substantial amounts of essential nutrients in relation to its calorie content. Nutrient-dense foods include whole grains, fruits, vegetables, seafood, lean meats, and nuts and seeds. The guidelines recommend consuming more of these foods, as they provide the body with the nutrients it needs to function properly and reduce the risk of chronic diseases.