Pro Series Super Size Ultra by MaxsMaxs Pro Series Super Size Ultra MAXS Pro Series Supersize Ultra is a premium high calorie mass gainer designed for athletes and hard gainers who need extra fuel to build size and strength. This formula delivers a powerful combination of protein, carbohydrates and key recovery nutrients to support muscle growth and post training recovery. With over 1200 calories, 60 g of protein and 200 g of carbohydrates per serve (when mixed with milk), Supersize