SERIOUS MASS is the ultimate muscle building and weight gain formula. With 1,250 calories per 2-scoop serving and 50 grams of protein to support muscle recovery, this powder makes the ideal post-workout and between meals shake for sizing up your goals. SERIOUS MASS provides you with the tools you need to support your weight gains goals.¹

• Purity - The neck of the tub is sealed with an induction vented liner inside the cap. The product has a plastic shrink wrap seal around the cap (outside) for protection.
• Who Needs Serious Mass: People with very active metabolism that struggle to gain weight
• Athletes or anyone who has extremely high energy needs that can-not be met only with food.
• How to Use: Prepare using an electric blender. Add fresh or frozen fruits, peanut butter, nuts & other calorie dense foods to boost your weight gain potential.
• When to Consume: Use post-workout and/or between meals to add calories, carbs and protein to your healthy, balanced diet.
• What is Serious Mass: Optimum Nutrition Serious Mass is a high calorie weight gainer which is also high in protein and when taken over time with regular resistance exercise  and a balanced diet can help you gain mass and muscle.