Leucine is an essential branched-chain amino acid (BCAA) important for protein synthesis and muscle growth. It is sold as a dietary supplement and is found naturally in foods like chicken, turkey, and cheese. Some research suggests leucine may help improve muscle mass, athletic recovery, inflammation, and blood sugar levels.

Leucine is considered a vital amino acid for the protein synthesis and various metabolic functions - in other words, it is an essential amino acid, which helps in regulating the blood-sugar levels, promotes the growth and the recovery of muscle and bone tissues, as well as the production of the growth hormone.

Leucine may help in healing skin and bones. It may increase muscle growth and lean body mass. It may increase production of human growth hormone. It may help control blood sugar.