L-Leucine is a type of amino acid that is derived from reactions taking place between pancreatic enzymes and protein. Adults need Leucine to keep nitrogen balanced in their systems, and children need it to keep up satisfactory rates of growth.
Valine, Leucine, and Isoleucine make up one of the chains called Branch Chain Amino Acids. They make up a large amount of the body's total protein structure. Leucine is one of the main ways that the body is able to produce energy. This makes it very highly sought after by athletes. For this particular chain, it is best to take two parts Leucine, one part Valine and one part Isoleucine.
Just like Valine and Isoleucine, L-Leucine is able to repair damaged muscles and keep blood sugar at appropriate levels. It also helps to burn fat and get rid of pervasive fats that are normally hard to get rid of through normal exercise and dieting. This is the most effective of the other BCAAs because it is converted to glucose faster than others.
Bodybuilding supplements are routinely stocked with Leucine, as its properties allow it to enhance exercise performance. It also keeps lean muscle tissue intact during exercise and keeps levels of nitrogen in the body at a balanced level.