Serious Mass 2.72 Kg by Optimum Nutrition is the perfect supplement for those looking for a significant increase in weight and muscle mass. This gainer, in a 2.72 kg format, is specifically formulated to supply the essential calories and nutrients for those with fast metabolisms or athletes who struggle to gain volume through their regular diets. Each serving mixed with water provides over 1250 calories, combining a slow-digesting carbohydrate matrix with a high biological value protein blend. This formulation ensures a continuous supply of energy and amino acids, facilitating accelerated recovery after intense workouts and maintaining an anabolic state throughout the day. Additionally, it includes creatine monohydrate and glutamine, vital for muscle strength and health, along with 25 vitamins and minerals that optimize metabolic performance. This product is suitable for hardgainers, endurance athletes, and strength athletes who require a high caloric intake to develop their muscle mass and improve performance.