Serious Mass 2.72 Kg by Optimum Nutrition is a leading supplement for muscle growth and weight gain for individuals with fast metabolisms or athletes facing volume challenges. This product, when mixed with water, provides over 1250 calories per serving, combining a matrix of slow-digesting carbohydrates with a high biological value protein blend. Each serving supports accelerated recovery and maintains an anabolic state essential for muscle development. The formula includes creatine monohydrate and 25 vitamins and minerals that optimize metabolic performance. Ideal for 'hardgainers' and athletes, this product serves as a comprehensive supplement for transforming body composition and enhancing physical power. It is recommended to mix 2 scoops (334 g) with 710 ml of water or skim milk.