Ignite muscle growth all day and stay lean with these flavorful, protein-packed snacks. Protein is superfuel for your body. It repairs your muscle fibers after a lifting session, providing the raw material that helps them grow bigger when you’re trying to gain size. But besides building muscle, protein helps keep you lean because it’s satiating—so you’re likely to eat less and feel more satisfied. Plus, if you’re trying to lose weight, it helps protect your hard-earned muscle from being used as energy.