For increased athletic performance, many rely on whey protein—a mixture of certain proteins naturally found in milk. In fact, whey protein is more rapidly digested than other proteins, and may provide for faster absorption.

Protein is necessary for building and rebuilding healthy muscles—and this is especially important for bodybuilders. According to the American Journal of Physiology, Endocrinology and Metabolism, studies suggest that whey protein can increase gains in lean body mass resulting from exercise. Plus, whey protein contains the perfect combination of overall amino acids in just the right concentrations for optimal performance.