Prolab Nutrition acute s Amino 2000 is a high potency amino acid formula containing 2000 mg of pure naturally occuring L form amino acids scientifically proportioned to meet your nutritional needs. Quality protein & a postive nitrogen balance are two important principles for hard training athletes. Therefore Prolab acute s Amino 2000 is designed with these factors in mind. Positive nitrogen balance occurs when there is an abundant source of quality protein available to be used by the muscles.