Skip to content
Current Dispatch Times: Normal [Same Day Before 3pm EST]
Current Dispatch Times: Normal [Same Day Before 3pm EST]

Serious Mass

31 reviews
$84.99 CAD

Product Info

High-Calorie Weight Gainer

Although many people traditionally try to lose weight, there are several instances when gaining weight is equally as desired. For a healthy and nutritious way to increase the number on the scale, there are few products better than Serious Mass by Optimum Nutrition. Whether you need to gain weight for bodybuilding, for a growing teen who can't eat enough to keep their weight sustained, or in response to specific medical ailments, this weight gainer is healthy and delicious.

  • 1,250 calories in each serving
  • 50 grams of blended protein for sustained support
  • More than 250 grams of carbohydrates
  • Zero added sugar
  • 25 essential vitamins and minerals
  • 12lb container
  • Five delicious flavours

Smart Ingredients

Gaining weight isn't just about eating whatever you want. There is a smart way to pack on the pounds, and Optimum Nutrition is an expert in the essential ingredients you need to support your body's growth. Each serving of Serious Mass contains 1,250 calories, 50 grams of blended protein, and more than 250 grams of carbohydrates with no added sugars.

Vitamins and Mineral Support

In addition to a delicious formula with an incredible amount of protein, Serious Mass also offers 25 essential vitamins and minerals, including creatine, glutamic acid, and glutamine. Together, the ingredients in Serious Mass help boost your overall calorie intake, fuel extreme workouts and build and maintain muscle. Each serving is two scoops of powder, but Serious Mass's serving size is easy to adjust if necessary!

Fuel your body with Serious Mass by Optimum Nutrition!

Optimum Nutrition Serious Mass Nutrition Facts at Supplement Superstore Canada

Supplement Nutrition Info

12lb / Chocolate

12lb / Vanilla

12lb / Strawberry

12lb / Banana

12lb / Chocolate Peanut Butter


Customer Reviews
4.9 Based on 31 Reviews
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
  • service
  • delivery
  • taste
  • Everything
  • flavour
  • protein
  • scoop
  • weight
  • shipping
  • strawberry
Arshmit G.
Canada Canada
I recommend this product
Serious mass

Serious mass is a great Mass gainer. I actually felt the difference by just taking 1 scoop everyday along with my diet. The delivery was fast and the website is easy to use.

Richard Z.
Canada Canada
I recommend this product
Great product for gaining

Easy to mix and not so heavy compared to some other weight gainers

Dante B.
Canada Canada
I recommend this product
Amazing Supplement

One of the best supplements that i've came across. So long as its available, its my go to product.

Darrell S.
Canada Canada
I recommend this product
Serious Mass

The delivery usually doesnt take longer than 3 days, which is a great thing. The service is great. The taste of Serious Mass is also great and it doesnt give you that heavy fealing after drinking. Which is a great thing also

Samantha W.
Canada Canada
I recommend this product

Great value, convenient resealable bag.