Optimum Nutrition Serious Mass Weight Gainer

The Ultimate Weight Gainer

Optimum Nutrition Serious Mass is a high-calorie mass gainer delivering 1,250 calories and 50g of protein per serving. Packed with complex carbohydrates, vitamins, minerals, creatine, and glutamine to help hard-gainers pack on serious size.

• 1,250 calories per serving
• 50g protein from multiple sources
• 252g carbohydrates per serving
• 25 vitamins & minerals added
• Creatine & glutamine included
• 8 servings per 5.44kg bag