Serious Mass by Optimum Nutrition is a premium mass gainer supplement that helps individuals achieve their muscle-building and weight gain goals. This product is packed with 1,250 calories per serving, making it an excellent option for those struggling to meet their daily calorie needs. Each serving contains 50g of protein to support muscle growth and repair, along with 252g of carbohydrates to replenish glycogen stores after intense workouts. The formula is enriched with essential vitamins and minerals to aid overall health and improve performance. Whether used as a meal replacement or post-workout recovery, Serious Mass is designed for people aiming to gain weight in a healthy and efficient manner. It is available in a delicious chocolate flavor and is naturally and artificially flavored for enhanced taste.