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Optimum Nutrition Serious Mass

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Optimum Nutrition Serious Mass - High-Calorie Weight Gainer! Weight Gainer With 50g Of Protein, Over 250g Of Carbohydrates With No Added Sugar, Glutamine, Creatine & 25 Vitamins & Essential Minerals!
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Protein Powder Weight Gainer! Loaded with 1,250 Calories, 250g of Carbs, & 25 Vitamins and Minerals to Pack on Pound!

Serious Mass: the ultimate in weight gain formulas. Serious Mass supplies you with the tools you need to pack on the pounds and develop the physique you've always wanted. Each serving of Serious Mass contains 1250 serious calories derived primarily from protein sparing complex carbohydrates and a high quality protein blend consisting of Whey Protein Concentrate, Calcium Caseinate, and Egg albumen. Creatine Monohydrate, Glutamine, Choline and Inositol have been added to optimize each strength training workout while a complete vitamin and mineral profile insures your body gets the balanced nutrition it needs.

Packing a very substantial 1,250 calories into every serving – even more when mixed with cold milk – Serious Mass is the ultimate weight gain formula. With 50 grams of muscle building protein, when used in conjunction with a healthy, balanced diet and regular weight training, this powdered mix provides you with serious weight gaining support for developing your physique to the fullest.



Optimum Nutrition has been spotting the efforts of goal driven individuals since 1986. As one of the few companies to own and operate state-of-the-art manufacturing facilities that are GMP compliant and NSF Certified for Sport, ON assures that every shake will mix up effortlessly because the company started instantizing powdered products back in 2000. You also expect each shake to taste the same as the last and your next. That’s the kind of consistency ON delivers.



Optimum Nutrition is legendary for both quality and innovation. In addition to producing the world’s best-selling whey protein, ON’s Gold Standard 100% Casein introduced slow-digesting nighttime protein to the weight training world and Amino Energy created the anytime energy category in sports nutrition. When technology makes advancements possible, ON will be the company bringing it to you.


Note: Manufacturers continually change product specifications. While we try our best to keep product descriptions up to date, they do not necessarily reflect the latest information available from the manufacturer. We are not responsible for incorrect or outdated product descriptions and/or images.

  1. Quality
    nastiest tasting protein powder i have ever tasted in my life... this stuff is absolutely disgusting to drink and you have to mix this and a ton of fruit/sugar to have it actually tolerable.definitely won't buy this [*] again.
  2. Quality
    i would buy this product over and over.
    this product is really perfect i got to 4 days of taking it. 3 servings a dayan i really see the results.i never had a weight gainer that work like thisthe serving size is 2 scoopsand it can be pretty hard at first to drink 3 servingsbut its very having great gains...
  3. Quality
    I plan on sticking with this product
    blend with 24oz of water|easy to drink...taste is decent.|huge servings...needs more calories for the amount taken per serving!!!
  4. Quality
    How to mix
    I tried mixing according to directions - way too thick. I use only 1 scoop mix with 2 cups of milk tray of ice (important) bit of chocolate syrup ice cream (1-2 cups) and mix for 45 seconds. Makes a whole blender drink it before I go to bed. Much easier and better tasting this way than the 2 scoops recommended.
  5. Quality
    Very Effective
    I'm a skinny guy and I don't have a very big appetite one thing I like about Serious Mass is that I can mix one scoop with a shaker of water 3 times a day at work it's very smooth and easy to drink. I've gained 15 pounds of muscle in the last 2 months.
  6. Quality
    Great meal replacer
    I drink two scoops every morning bc I simply don't have time for breakfast. It tastes excellent but you definitely need a shaker with the whisk ball in it to make these. I even replace other meals with this when I have to but it's very cost effective! I order a ton up front and it lasts me months.
  7. Quality
    overall the top weight gainer for the $$
    when first got the product i would take a full serving which would fill me up for hours and barely would fit in my shaker cup. now i use only one scoop per serving which is still 600 cals 125 carbs and 25 pro. i usually supplement a whey protein serving with it also to make it about 50 to 60 grams of protein and it works out well. i would also suggest mixing it in water as it mixing much better an
  8. Quality
    Great gainer shake
    If your looking to pack on body weight quick or you are looking for a great source of calories for sports this stuff is awesome.
  9. Quality
    Another fine optimum nutrition product. Good taste mixes easily tons of calories and protein. Is well worth a try for anyone looking for a gainer.
  10. Quality
    cheap and effective taste good
    was leaning up this summer and got down to 235 lbs a little to lean for me so i bought this product to stop my losing of weight and it did in two weeks was back to 245 Lbs but i still had the lean look of before and my mucsle felt way more full becauce of the high carbs of the shake best of all i had no bloated feeling like some protien powders do and it really tasted good. using this product o

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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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