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ON Serious Mass

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From $29.09 To $48.99
$29.09 $ 29.09
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ON Serious Mass | High-Calorie Weight Gainer

Optimum Nutrition Serious Mass is the ultimate in weight gain formulas. With 1,250 calories per serving and 50 grams of protein for muscle recovery support, 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.

*Cookies & Cream Coming Soon!*

Highlights of Optimum Nutrition Serious Mass:

  • 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
  • Creatine, Glutamine and Glutamic Acid
  • 25 Vitamins and Essential Minerals

4.9 / 5.0
28 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
4.8 / 5
4.8 / 5
5.0 / 5
Delivery Speed
5.0 / 5
ON Serious Mass
Very happy with this product!!!! Great taste, easy on your stomach. Order was shipped same day I've ordered. Tiger Fitness way to go. ..
August 23, 2013
Great quality and good price.
Great quality and good price. Good amount of calories even compared to other mass gainers.
July 13, 2015
Great taste and very fast
Great taste and very fast shipping, can't ask for much more than that!
July 27, 2015
This stuff is solid, I recommend 1/2 a serving size for roughly 1-2 weeks until your stomach can handle the full serving size. Excellent product!
July 1, 2014
Helps calories but very filling
October 24, 2013
5 / 5
4 / 5
5 / 5
Delivery Speed
5 / 5
Really good love the cookie n cream flavor
July 17, 2018
2 months ago
I really like this product
I really like this product I have seen some gainz
November 4, 2014
Great site for the best price guaranteed
I heard about this site from POG. I looked them up and I was sure impress by both the price and the great customer service. This is my go to site!
December 22, 2013
Serious Mass - DOPE
I was kinda skeptical when it comes to flavor and taste, the chocolate flavor is awesome, thought I was gonna get tired of it but instead continued without feeling irritated. The best part of it is the result, you know its real when you look at yourself, then you end up smiling.
May 21, 2014
Serious mass
Great taste and results.
October 31, 2013
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 9 questions Browse 9 questions and 9 answers
which would you say is better when it comes to trying to put on weight ... serious mass or prolab nlarge 3 ? Boom go
Eric g on Mar 20, 2014
BEST ANSWER: I have not tried the prolab product, but Serious Mass works really well. I will actually be buying another bag in a week or two.
Good morning. Do you know when you are expecting the 6lb container back in stock? Thanks
Scott B on Nov 11, 2014
BEST ANSWER: We currently have this product in Stock Scott.
Is this the best weight gainer?
A shopper on Nov 10, 2014
BEST ANSWER: Yes! I'm a small guy with a very very high metabolism! This stuff tastes great, I've bought the peanut butter and the chocolate brand. BOTH stellar. I went from 129 pounds to 145 in two months. I'm currently at 155 shooting for 160 and then packing on some more muscle. I dont have a strict diet so this speaks for itself
how much does shipping to UK cost?
Amal B on Jun 1, 2014
BEST ANSWER: Yes we do.
deliver to uk?
A shopper on Jun 1, 2014
BEST ANSWER: Yes we do.
do you ship this to singapore?
saifuddin ahmad on Apr 19, 2014
BEST ANSWER: Yes we do.
BSN True Mass 1200 or serious mass is better i weight 132lb?
salil arora on Mar 10, 2014
BEST ANSWER: they are very comparable. If taste is an issue, BSN wins in that regard. Overall one is not better than the other.
how long does it take to see the results?
First Name L on Nov 9, 2013
BEST ANSWER: You'll see results as quickly or slowly as you use it. This will not give you results alone. Overall calorie intake will. Eat big meals and use this stuff (half serving twice a day) to get your calorie surplus. Do that and you will see results in no time. Aim for 1 pound a week
when will you restock 12lb vanilla?
thomas b on Feb 21, 2016

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* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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