Proteins are the main building blocks of the body. Protein is in your muscles, bones, skin, hair, and virtually every other body part or tissue. It makes up the enzymes that power many chemical reactions and the hemoglobin that carries oxygen in your blood.
As for our diet; protein plays an important part in any healthy lifestyle. The amount of food from the Protein Foods Group you need to eat depends on age, sex, and level of physical activity. Most Americans eat enough food from this group, but need to make leaner and more varied selections of these foods. USDA MyPlate is encouraging people to vary their protein routine.