Hammer's Endurance Amino is ideal to use hourly during efforts that extend beyond 2 hours and post-workout. This gluten-free capsule decreases your perception of fatigue and increases cognitive performance as well as builds, maintains and repairs lean muscle mass. The foundation of Endurance Amino is the 3 Branched Chain Amino Acids (l-leucine, l-isoleucine, l-valine), which help delay exercise-induced and nervous system-induced fatigue to improve immune system reaction and enhance recovery. You also get l-alanine, which your liver converts into glucose, which the bloodstream transports to the muscles for energy. Additionally, l-alanine aids in the synthesis of vitamin B5, which is needed for protein, fat, and carbohydrate metabolism.