Intra-Workout Catalyst. 3500mg L-Leucine For Muscle Protein Synthesis. 7000mg BCAAs. Over 4600mg of L-Glutamine, Citrulline Malate & Electrolytes. Zero Sugar or Carbs. Build Muscle, Burn Fat, Recovery Faster. Scivation Xtend the most advanced sugar and carbohydrate-free Intra-Workout Catalyst, scientifically formulated to maximize training intensity and promote optimal muscle protein synthesis and recovery while you train.