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Serious Mass is a high-quality gainer in the form of an all-in-one blend containing a high dose of quality carbohydrates. In addition, it is also a source of proteins that contribute to muscle growth, and there is no lack of vitamins, minerals or creatine. One serving has over 1,260 kcal, making it ideal for people who are trying to increase their calorie intake, for example, during the bulking phase.

In stock
€65.95
(€12.10/ kg)

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Reviews266

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Serious Mass - Optimum Nutrition

4.5
Average from 266 reviews
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Customer Experiences:

Reviews for this Serious Mass type mass gainer are overwhelmingly positive. Customers repeatedly highlight visible weight and strength gains, often within 2 weeks, plus high satiety and strong daily energy. Many praise dissolving and shakeability, with flavors generally described as tasty and not overly foamy. Most users report good tolerance, though a small share mentions skin changes or personal sensitivity, and some dislike specific flavors or very sweet taste.

  • Visible gain in weeks
    |
  • Good mixability
    |
  • Filling, high calories
    |
  • Pleasant flavor variety
    |
  • Good overall tolerance
    |
  • Energy for training

Generated by AI from 266 customer reviews.

Most Beneficial Positive Review of Product

Joseff

Unverified purchase
top, easy-to-digest gainer from Optimum Nutrition brand, which completely satiates like a regular meal, I gained 2kg from this package, excellent taste and nutritional values

All Reviews

English reviews (17)
Verified purchases (0)
Positive (17)
Negative (0)
Reviews in other countries (266)
  • Ferkó

    Unverified purchase

    August 12, 2015

    YOU
    I only use ON of everything. I am very satisfied with all their products, they are of the highest quality you can get. And they are not expensive either.
    Recommended
    Was this review helpful to you?
  • Zsiga

    Unverified purchase

    July 16, 2015

    Test
    I just bought this for the first time and I'm eagerly waiting to see if it's really as good as many people have said! I'll write a review later!
    Recommended
    Was this review helpful to you?
  • Jocó

    Unverified purchase

    July 15, 2015

    my favorite
    This is my favorite bulking agent! I don't use anything else but this one, but I see I'm not the only one like that!
    Recommended
    Was this review helpful to you?
  • Ödön

    Unverified purchase

    June 15, 2015

    Super
    The best weight gainer I've used so far. I've tried a lot, but this is the best in my opinion. It's delicious and the effect is also very good
    Recommended
    Was this review helpful to you?
  • Troop

    Unverified purchase

    May 20, 2015

    Useful stuff
    I love it so much! Best I've used so far! I recommend it to everyone!
    Recommended
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  • Adrian

    Unverified purchase

    February 3, 2015

    .
    When will this product in this package be in stock? :)
    Recommended
    Was this review helpful to you?
  • Joseff

    Unverified purchase

    November 13, 2014

    quality
    top, easy-to-digest gainer from Optimum Nutrition brand, which completely satiates like a regular meal, I gained 2kg from this package, excellent taste and nutritional values
    Recommended
    Was this review helpful to you?
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