Serious Mass is the ultimate MASS gain formula. With 50 grams of muscle-building protein, when used in conjunction with a healthy, balanced diet and regular weight training, this powdered mix provides you with serious MASSgaining support for developiNg your physique to the fullest. To obtain mass, strength, and size at a rapid pace. his mass is the ultimate MASS gain formula.* With 1,250 calories per serving and 50 grams of protein for muscle recovery, this instantized powder makes a sizable post-workout and between meals shake