Serious Mass by Optimum Nutrition is the ultimate weight gaining formula that champions quicker muscle building. If you find it difficult to gain weight, Serious Mass can help you develop the physique you're striving for. Without consuming adequate calories or quality protein sources, you simply can't get any bigger to enhance muscle growth.
Serious Mass is designed to provide serious calories, protein and carbohydrates - making this a convenient way to get extra calories throughout your day.

Benefits :
• 50 g of protein to support muscle building and recovery.
• 1,260 calories to support calorie surplus for weight and muscle building.
• 251 g of carbohydrate to support fueling of intense workouts and aid in replenishment of glycogen stores.
• 5 g of creatine monohydrate to support strength, power, and performance.
• Naturally Occurring Glutamine 8 g, Branched Chain Amino Acids 11 g and Essential Amino Acids 24 g.
• Good source of 19 vitamins and minerals.
• Vitamins A, C, E, and zinc help support a healthy immune system.
• B vitamins help convert food to cellular energy.