Critical Mass Lean Mass Gainz, Applied Nutrition, Chocolate, 2.45 KgApplied Nutrition Critical Mass Lean Mass Gainz, Chocolate, 2. 45 Kg, is a toptier weight gain supplement designed to support muscle growth and weight gain. Each serving delivers 42 grams of fast and slow absorption protein, ensuring a sustained supply of protein for muscle building and recovery. This product is high in calories, combining protein and carbohydrates to help increase both weight and muscle mass while replenishing the body's energy