Optimum Nutrition (ON) Serious Mass & Muscle Gainer (5 lb)



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For Weight Gain and Muscle Building Goals

SERIOUS MASS is the ultimate weight gain and muscle-building formula. With +1200 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.

Brand Optimum Nutrition (ON)
Items Serious Mass & Muscle Gainer
Flavour Chocolate, Vanilla
Weight 1.4 Kilograms, 2.7 Kilograms, 5.4 Kilograms


  • High-Calorie Formula Supports Weight Gain¹ and Muscle Building Goals²
  • +1200 Calories per Serving to Help Boost Calorie Intake¹ (calories may vary according to flavors)
  • 50 Grams of Protein per Serving to Help Build and Maintain Muscle¹²
  • +250 Grams of Carbohydrates per Serving to Help Fuel Workouts¹
  • 1 gram Creatine Monohydrate per serving.
  • 1 gram Glutamine per serving.
  • 23 Vitamins & Essential Minerals.


Mix 2 scoops of the powder into 24 fluid ounces (710ml) of cold water or milk using an electric blender. This allows you to add in fruits, peanut butter, and other calorie-contributing foods. TIP: New users should start with a 1-scoop half serving. Use post-workout and/or between meals to add calories, carbs, and protein to your healthy, balanced diet.

Not For medicinal Use. Use this product as a food for special dietary use only. For healthy adults, consume enough protein to meet your daily protein requirements with a combination of high protein foods and protein supplements throughout the day as a part of a balanced diet and exercise program.

Additional information

Weight 2500 g
Dimensions 18 × 14 × 22 cm

Chocolate, Vanilla


1.4 Kg, 2.7 Kg, 5.4 Kg


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