THE PROTEIN WORKS™ Total Mass Matrix is the ultimate weight gainer shake with its calorie dense profile, designed for anyone looking to bulk up and increase muscle mass. Packed with over 450 calories per serving and over 40g of protein, it is the ideal protein formula to add healthy weight, mass and size, without adding fat. With a unique multi-sourced protein and carb blend to ensure a potent release of nutrients to help gain muscle mass. The cutting-edge high carb, high protein blend includes premium grade whey protein concentrate for a fast release of nutrients. The unique blend is also extremely high in BCAA's and has a varied, comprehensive amino profile that's scientifically proven to accelerate muscle growth. Total Mass Matrix is one of the best Mass gainers on the market today. Click on the Product to see full information for your absolute peace of mind.