Glutamine recovery complex. Increase endurance, build muscle, burn fat and recover faster. Glutagen the science: Each serving of GlutaGen contains a complete dose of L-Glutamine to support muscle recovery and a healthy immune system. Leucine, Isoleucine and Valine help prevent muscle catabolism during and after exercise. COPMAX helps replenish ATP stores depleted during physical activity. Bioperine and B Vitamins Support increased bioavailability for optimal absorption and digestive efficiency.