Proteins

The next category of essential nutrients is referred to as proteins. Proteins are the nutrients that provide most of the body’s material for building and repairing cells. Muscles, tendons, ligaments, and blood vessels are largely made up of protein. Bone and teeth are made up of protein and minerals. Stored body protein is essential during illness, after an injury, and during lengthy strenuous activity.

Most meats and other animal products contain complete protein. While many plant foods contain protein, they do not contain complete proteins; however, eating combinations of plant foods such as rice and beans can supply the body with complete proteins.

People who do not eat meat are known as vegetarians. Some vegetarians eat animal products such as milk, cheese, and eggs, which supply complete proteins. However, vegetarians who eat only plant foods must eat certain vegetable combinations in order to ensure they receive the necessary supply of complete proteins.

Eating too many high protein foods can cause health problems as well, because many are high-fat foods. Most Americans have diets that contain too much protein.