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Protein is an essential nutrient found in animal products, nuts, and beans. The name protein name comes from the Greek word protos, which means âfirst.â Your body uses proteins in your diet to build new cells, maintain tissues, and synthesize new proteins that make it possible for you to perform basic bodily functions.
â The Need-to-Know An essential nutrient, protein helps build and repair muscles, which is why many athletes consider protein an essential part of their diets. Protein bars are a convenient way to protein load â some even contain as much protein as a chicken breast.