Serious Mass 2,7kg

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Serious Mass 5,45kg

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Get 10% discount in "Serious Mass 5,45kg" and save £5.30.


Optimum Nutrition:

Serious Mass

No Sugar Added Weight Gain Supplement

(Read 92 reviews)


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Reference 1OPT1239
EAN 5060245600934 (Strawberry),5060245601023 (Vanilla),5060245601061 (Banana),5060245600453 (Chocolate),5060469983363 (Cookies & Cream),5060245607650 (Chocolate Peanuts)
Units sold last week 32
Viewed last 48 hours 341
Customers rating
Inventory level Medium
Tags without creatine
Trend Rising star
Rank #1 in Gainer
Added to Zumub 1, January 2010
Last updated 23, September 2019

Serious mass gains require serious amounts of calories and Serious Mass delivers with 1250 calories per dose making your goal of gaining weight much easier!

Very often, those who want to gain weight are those who have the hardest time doing so, due to fast metabolism, weak appetite or busy lifestyles that make it impossible to eat large quantities often.  Serious Mass ON fights these difficulties, offering 1250 to 1600 calories per shake, a very high quantity of high quality calories.

To give you an idea, each Serious Mass shake offers:

  • 1250 calories if mixed with water or 1600 calories if mixed with milk
  • 50 grams of protein from both quickly and slowly digested sources such as whey casein and eggs
  • 250 grams of carbohydrates to provide energy for intense workouts and maintain glycogen reserves- without added sugar
  • 24 essential vitamins and minerals, with B vitamins and antioxidants
  • Fortified with glutamine and creatine

Optimum Serious Mass is the ultimate solution for gaining weight, gaining mass and creating muscle.  Serious Mass is a quality, economical weight gainer from Optimum Nutrition with high quantities of all the necessary ingredients, with reduced sugar and fat.

Its delicious formula allows you to drink shake after shake without getting tired of it.  It's a versatile gainer with smooth flavors that allow you to combine and try out other ingredients and explore new flavors, adding more calories.  Try creating your own premium gainer adding Serious Mass:

Serving size



Serving size



2 tablespoons

Peanut Butter


1 small



1 tablespoon

Ice Cream


¼ meter

Chocolate wafers


30 grams



1 tablespoon



Try and see the results in no time with the best-selling weight gainer in the world!

Disclaimer: This product is not intended to diagnose, treat, cure, or prevent any disease. Results may vary from individual to individual, depending on a range of factors, including gender and age.

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Questions & Answers Serious Mass

Questions & Answers Serious Mass

How many days delivery in Italy
by Areeb S.
Shipping by truck 6 working days
Express shipping 3 working days
by Zumub - 08/01/2018 0 0

Have a question about Serious Mass? What is it, what does it do, how and when to use or something else? Ask us.

Reviews for Serious Mass

Reviews for Serious Mass

Disclaimer: The reviews provided in this page reflect the personal opinion of the corresponding user. Results may vary from individual to individual, depending on a range of factors, including gender and age.


Buy Serious Mass

2.72 kg


+107 Zumub points 

5.45 kg


+177 Zumub points 

+ 400.000 orders sent

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