L-leucine l-isoleucine and l-valine are commonly grouped together and referred as branched chain amino acids or bcaas because of their unique branched chain chemical structure. Bcaa and l-glutamine are essential amino acids the bcaa make 40% of the daily requirement of all nine essential amino acids and makeup to 35% of all muscle tissue. Bcaa with l-glutamine supports muscle development minimizes muscle tissue loss during exercise and speed up recovery.