Branch chain amino acids (BCAA) are an important category of essential amino acids consisting of leucine, isoleucine, and valine. BCAAs are essential amino acids for humans, as the body cannot produce them. The only source is daily diet or dietary supplements.

They represent 35% of the essential amino acids in muscle proteins. Leucine, isoleucine, and valine are provided by mixed dietary intakes of proteins from various sources.

BCAAs can be consumed as dietary supplements, for intense workouts, or even for simple physical training. BCAA-X contains a 2:1:1 ratio of leucine, isoleucine, and valine and is in a convenient, precise capsule dosage form.