Serious Mass

Optimum Nutrition

Serious Mass has a rating of 4.8 stars based on 47 reviews.

Type: Mass Gainers

What it is: Winter is coming...or Bulking Season. When its time to bulk, its time to add mass the right way. In order to do that, you need to overload your body with the proper nutrients. You need calories, protein, carbs, and fats to tell your body to add mass. Serious Mass by Optimum gives you just that...and more. It is the #1 Mass Gainer on the market and has helped so many bulk the right way. 

Mass Gainers are also great for anyone having difficult putting on size due to their fast metabolism. Serious Mass will work with your body to not allow it to burn all the nutrients post workout and allow you to build muscle. People usually have the fastest metabolism in their college years so it is a perfect match. 

Optimum Nutrition Serious Mass

How it works: Serious Mass is the ultimate in weight gain formulas. With 1,250 calories per serving and 50 grams of protein for muscle recovery, this instantized 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 pack on the pounds and help you develop the physique you’ve always wanted.


  • Adding Calories Has Never Been This Easy or Tasted So Good
  • 1,250 Calories
  • 50 Grams of Blended Protein
  • Over 250 Grams of Carbohydrates with No Added Sugar
  • Enhanced with Creatine, Glutamine, and Glutamic Acid
  • 25 Vitamins and Essential Minerals

Key ingredients: Whey Protein

Use it: In the morning when you wake up, right after you workout, before you go to bed or as a meal replacement.




Servings: 6 Lbs. - 8 Total Servings (16 Scoops) / 12 Lbs. - 16 Total Servings (32 Scoops)

Optimum Nutrition Serious Mass