Xtend BCAA Xtend BCAA contains immediate amino acids that enhance the bodys ability to withstand intense and intense exercises, helps increase the ability to lift weights and exercise endurance, and helps improve muscle response and reduce the feeling of muscle fatigue after exercise. Features of Xtend Original BCAA Improve muscle performance and response. Helps in muscle recovery. Low sugar and carbohydrates. Increase endurance during exercise. Increased muscle mass.