Core Champs MASS High-Calorie Mass Gainer CORE CHAMPS MASS Gainer is made with 100% whey protein that delivers a massive 1250 calories when mixed with 18-20 oz. of water. CORE CHAMPS MASS Gainer contains 50-gram high-quality protein, quickly digested carbohydrates, and other minerals. This advanced mass gainer has been designed for any individual who has a tough time adding size, is in their bulking phase, or wants to break through their strength plateaus. CORE CHAMPS MASS Gainer is loaded with huge amounts of Branched Chain Amino Acids (leucine, isoleucine, and valine) in every serving – all of which are critical for muscle building, strength, and recovery from workouts.