As we all know, consuming extra protein can support muscle protein synthesis which is the key to building and maintaining lean muscle tissue while preventing its loss at the core. So why does protein stimulate muscle protein anabolism? Protein is made up of essential and non-essential amino acids which all have proven to boost/support muscle protein synthesis. Leucine, an essential amino acid, is of particular interest to us as it happens to be the most important amino acid responsible for supporting protein synthesis. Recent clinical studies document that leucine might be the major reason for dietary protein to stimulate protein synthesis. Researchers believe that leucine"s major pathway involves the activation of motor (a gene vector of sorts), which transports the signal to the nucleus of the cell to initiate the growth process. in other words, with added l-leucine you now have an outside stimuli in the body to carry on the growth message to its receptor, which in turn activates growth. Leucine2leucine is also believed to increase resting metabolism, which in turn, causes the body to lose energy as heat rather than storing it as body fat. Leucine may also support healthy blood sugar levels whether you want to build more muscle or looking to decrease body fat, performance leucine by san is the answer; it is the holy grail of all amino acids. for best results, mix san"s performance leucine with your favorite protein shake and or fierce domination, mass effect or other innovative supplements.