Optimum Nutrition Serious Mass



To gain weight, you need to consume more calories than you expend. For many people looking to hit their calorie goals and gain size, an overactive metabolism, poor appetite or on-the-go lifestyle can make getting enough calories from food alone a real challenge.


Optimum Nutrition Serious Mass

Optimum Nutrition Serious MassSERIOUS MASS is the ultimate muscle building and weight gain formula. With 1,250 calories and 50 grams of protein per 2-scoop serving to support muscle recovery, this powder makes an ideal post-workout and between-meal shake to boost your goals. SERIOUS MASS gives you the tools you need to support your weight gain goals.

Optimum Nutrition Serious Mass

How to Use?

Using an electric blender, mix 2 scoops of powder with 24 fluid ounces of cold water or milk. This allows you to add fruits, peanut butter, and other calorie-providing foods. Tip: New users should start with 1 scoop half serving. Use post-workout and/or between meals to add calories, carbohydrates and protein to your healthy, balanced diet.

Optimum Nutrition Serious Mass


  • High calorie formula supports muscle building and weight gain goals¹
  • 1,250 calories per serving to help boost calorie intake
  • 50 grams of protein per serving¹ ³ to help build and maintain muscle
  • 252-254 grams of carbohydrates per serving¹ to help fuel workouts
  • 3 grams of creatine monohydrate per serving
  • 25 Vitamins and Essential Minerals
Optimum Nutrition Serious Mass

Suitable For

-Longer and harder training to gain more muscle
-It is difficult to consume enough calories through food alone.
-Gaining weight is difficult regardless of the amount of food you eat.

Optimum Nutrition Serious Mass


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