Serious Mass: the ultimate in weight gain formulas. Serious Mass supplies you with the tools you need to pack on the pounds and develop the physique you've always wanted. Each serving of Serious Mass contains 1250 serious calories derived primarily from protein sparing complex carbohydrates and a high quality protein blend consisting of Whey ... OPTIMUM'S VERY OWN WEIGHT GAINER! 50 Grams Of Protein With Glutamine And Creatine Plus 1,250 Calories! (Per 2 scoop serving) WHAT IS SERIOUS MASS? OPTIMUM SERIOUS MASS GAINER CAN HELP! Serious Mass is the ultimate weight gain formula. With 1,250 calories per serving and 50 grams of protein for muscle recovery, this ins
True Mass Nutrition Facts. BSN's signature weight gainer checks in at respectable 700 total calories. The mass gain mixture consists of protein (46-50g) from 7 different sources, carbohydrates (87g) from maltodextrin, and fats (18g), which includes MCT powder.