The U.S. Department of Agriculture places eggs in the protein foods group. This category also includes meat, poultry, seafood, beans, peas, soy products, nuts and seeds.
The body uses protein in eggs to build essential components, including bones, blood, muscle, skin, hormones and enzymes. Eggs provide the minerals iron, which helps the bloodstream transport oxygen, and zinc, which aids the immune system. Several B vitamins also are found in eggs. These affect energy level, the nervous system, and blood and tissue production.
For maximum health benefits, the USDA recommends eating a variety of protein foods, though the amount required depends upon sex, age and activity level.