LEUCINE STACK is a supplement composed of two forms of leucine with a more rapid & a slower rate of penetration into the muscle tissue so as to ensure that anabolic leucine penetrates the muscles over the longest possible time facilitating the development of their strength & mass. As a rapidly absorbable form ethyl ester of this amino acid Lleucine ethyl ester HCL considered the most exclusive & the most effective leucine compound of pharmaceutical quality was used here.