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Rule One Mass Gainer has over 1,000 Calories per serving, 40 g of protein, and low glycemic carbs (Pea Starch, Rice Bran, and Glucose Polymers), plus 2g of Creatine Monohydrate, Glutamine, and a full Vitamin and mineral Complex.This mass gainer has a 5:1 carb ration that is perfect for the athlete trying to add clean mass. The 1000 calories also allows the hardest of gainers to put on size. This is because this formula comes with the highest quality proteins and leaves out all the cheap protein you do not want.