L-Leucine, L-Isoleucine and L-Valine are commonly grouped together and referred to as Branched Chain Amino Acids, or Bcaa, because of their unique branched chemical structure. Bcaas are essential amino acids, meaning they must be consumed through the diet, since the human body cannot make them from other compounds. BCAAs provide active adults with versatile support for training endurance and recovery. These amino acids cannot be synthesized in the liver. Certain research publications indicate that BCAA may help support the following: