RED REX BEEF MASS PLUS is the perfect weight gain tool to help you reach your size, strength and muscle-building goals. Beef Mass Plus gainer offers high calories through ideal macronutrient levels to help you reach your daily caloric intake to build muscle mass. Containing 1,340 Calories, 284 grams of Carbohydrates, 50 grams of Hydrolyzed Beef Protein Isolate, and only 1 gram of Fat. Taking this after a workout is a sure-fire strategy to get some serious growth.