Amino Acids and BCAA's are the building blocks of muscle. Amino Acids support endurance, promote muscle growth, recovery and general health. Amino Acid Supplements are often used during and after workouts, think of them as an energy drink for your muscles. Usually these Amino drinks will not contain sugary carbs like traditional 'energy drinks' so they will not add extra calories to your diet. They provide muscle building blocks in the form of BCAAs and Amino Acids, the are proven to help you recover faster and build/retain muscle after and during workouts.