L Leucine is an essential amino acid that is used in the biosynthesis of proteins. It is essential in humans, meaning the body cannot synthesize it, it must be obtained from the diet. Main uses:

1. As a food additives, L-leucine has E number E641 and is classified as a flavor enhancer.

2. As a dietary supplement, leucine has been found to slow the degradation of muscle tissue by increasing the synthesis of muscle proteins, such as branched chain amino acids (BCAA)