MASS-TECH supplies the macronutrients and musclebuilding ingredients you need to help you gain mass, muscle size and strength! MASS-TECH EXTREME 2000 features 80g of protein, over 400g of carbs and 2,270 mass-producing calories, plus 8.2g of L-leucine(when mixed with 20 oz. of skim milk), 10g of creatine, and 20 vitamins and minerals!