Endurance & Recovery 6 Amino Acid - 8,000 mg Vegan, Caffeine Free GMP Quality Assured A Dietary Supplement Vegetarian - Vegan BCAA Big 6 is an advanced caffeine-free sports supplement formulated to support exercise endurance and recovery from intense workouts. BCAA Big 6 features branched-chained amino acids (BCAAs) to support muscle retention and recovery, and betaine to help maintain fluid balance during exercise. BCAA Big 6 also has taurine, which can further support endurance. BCAA Big 6 includes L-citrulline and L-glutamine to complement this formula.