Royalent™ Lean Mass is a high - calorie bodybuilding shake fortified with muscle building protein , carbohydrates , Creatine monohydrate and essential nutrients to gain size and strength quickly . It is rich in CALORIES for burning and to prevent muscle mass from being used as fuel, PROTEIN for building and sustaining muscle, 5 g in 100 g of CREATINE for strength and endurance, and numerous VITAMINS & MINERALS. Lean Mass is your one stop product for gaining mass and building strength . Lean Mass is perfect for young athletes and hard gainers who want to increase their caloric and protein intake to gain weight fast! It makes a powerhouse shake that's sure to help pack on new body weight.