Optimum Nutrition Serious Mass, 12 Lbs.

6,529 6,039


Optimum Nutrition Serious Mass, 12 Lbs.

4.50 out of 5 based on 4 customer ratings
(4 customer reviews )

6,529 6,039


  • 50g of protein per serving of 334g
  • Weight gain formula enhanced with 1250 calories per serving
  • Contains 25 essential vitamins and minerals
SKU: MG00010. Category: .
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50g of Protein per Serving of 334g
In every serving of this supplement, you get 50 grams of protein and creatine, glutamine and glutamic acid to fuel your hard working muscles and for a faster muscle recovery.

Weight gain formula enhanced with 1250 calories per serving
Along with fulfilling 100% of your daily protein requirement, it also gives you 1250 calories and a massive 252g of carbs per serving so that you gain dense slabs of muscle mass.

Enhanced with 25 Essential Vitamins and Minerals
Enriched with 25 vital nutrients, it fuflills your body’s nutritional requirement, keeping you focused on your fitness goals. Other key energy accelerators like creatine and glutamine give you intense burst of energy, reduce catabolism and speed up your recovery phase post-workout.

Weight 5.4 kg

Optimum Nutrition

Number Of Servings


Serving Size


Protein Per Serving


Weight Bucket

10.1 – 20 lbs

Flavour Base

Banana, Chocolate, Strawberry


Chocolate, Strawberry, Banana

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Customers' review

4 reviews 4.50 out of 5 stars
5 stars 2 50 %
4 stars 2 50 %
3 stars 0 0 %
2 stars 0 0 %
1 star 0 0 %

4 reviews for Optimum Nutrition Serious Mass, 12 Lbs.

    5 out of 5

    I just bought this protein and made my first shake of it yesterday. It is a bit intimidating adding those two monster scoops, but you have to do what you can to get the job done. I can already tell you that it might be best to split up and make two shakes in a day rather than putting two scoops in one shake, because lets be honest it's going to be a bit thick (we are using a mass gainer here). I hope anybody who takes this doesn't expect it to be extremely smooth like Gold Standard or anything. Banana flavor tastes good but might be a little sweet for my taste. Ready to see some results from taking this very good mass gainer.

    4 out of 5

    So today my strawberry Serious Mass came in the mail. In my opinion, there are 2 types of strawberry flavors. One that's fruity and sweet, that you might find in strawberry soda, or candy. And one that's creamy that you would find in a strawberry milkshake. When it comes to protein shakes/weight-gainer shakes, I prefer the creamy milkshake flavor. Unfortunately, the strawberry Serious Mass is very then, and fruity flavored. This type of flavor does not go well with milk in my opinion, and I might start taking it with water. I gave a 5/10 rating because it doesn't taste all that bad, but it doesn't taste good at all. (You can still choke it down) I am willing to try out different flavors however, and If anyone could tell me which flavor is very creamy like a milkshake, please do tell.

    5 out of 5

    Great product, I was taking 2 to 3 servings a day (up to 6 scoops) while eating 4 meals and snack. Within 30 days I was able to gain 27lbs. I struggle to gain and maintain size but this did in a month what prison food did in a year. You got to man up to drink it since its thick but this adds the pounds. Get serious and get mass. After trying pro complex of this brand. I prefer that. But every not and then I get this to mix it up with new ingredients

    4 out of 5

    Love. I cut the dosage in half since I'm on a budget and, weighing 165 lbs, I don't need that large amount of calories since I'm not trying to bloat myself. It takes a little bit of work to mix 12 ounces in a shaker bottle, but it tastes great and I have put on serious (good) weight since using this product. Definitely going to purchase again.

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