L-LEUCINE ORAL is a white crystalline powder or crystals with a slightly bitter taste and characteristic odor. It contains not less than 98.5% and not more than 101.0% of L-LEUCINE. L-LEUCINE ORAL is used as an essential amino acid in various pharmaceutical applications. As an amino acid, L-LEUCINE ORAL plays an important role in protein synthesis, which is beneficial for certain pharmaceutical treatments.