Optimum Nutrition Serious Mass Vanilla Powder is used for building muscle mass and strength. Each serving delivers over 1200 calories, 50 grams of protein, and a rich blend of creatine, and vitamins to help support workout performance and recovery. The protein source comes from whey protein concentrate, which can help in digestion and muscle development. Along with energy-boosting carbohydrates, the powder also contains 24 vital vitamins and minerals that may support overall well-being. It is an ideal supplement for athletes and individuals who require additional calories and nutrition for growth and performance.