Muscletech researchers have engineered a brand-New, 5-In-1, hardcore mass gainer designed for individuals looking to put on an extreme amount of mass. Mass-Tech extreme 2000 features 80G of protein, over 400G of carbs and 2,000 mass-Producing calories (When mixed with 16 oz. Of skim milk), plus 8G of l-Leucine, 10G of creatine, and 20 vitamins and minerals for huge size and strength gains.