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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
    Optimum Nutrition- Serious Mass
    I love this product but highly suggest getting a blender or you will have a difficult time mixing it. I've tried chocolate & banana & love both of them. I usually mix fruit in my shake and drink it in the AM. I def. works as I added mass (no belly either). I've always had trouble eating like 5-6 meals a day b/c of work & this substitute works great. The only downside is its thickness so like I
  2. Quality
    great product
    Two scoops three times a day.this product will put weight on you fast.
  3. Quality
    Excellent way to put on calories
    Excellent product. I take one serving size in the morning for breakfast. Surprisingly sits very well in my stomach--premium ingredients. Gives your body ample calories for physical exercise and building muscle.||This supplement does NOT pass right through your body (if you know what I mean) like other cheap weight gainers loaded with fillers. Optimum Nutrition products are QUALITY! ||If you are a
  4. Quality
    Very good product
    OK well I purchased this product before and I said that it was a ineffective product but I wasn't using it as I was directed to or on a daily basis so i decided to give it another try. Before I started to use it I weight in at 130 I'm a very hard gainer even if I eat junk food all day. After my first bag of serious mass I am now up to 150! I can't be any happier I finally feel like a average gu
  5. Quality
    It really works
    here are my comments: when I started this product I weighted about 185 and in about 10-12 weeks I was up to 205 so you do the math does it work? YES IT WORKS!!!! I generally make milk shakes with my favorite ice cream and it tastes very good. although the only thing is if it sits too long it becomes like paste and the the blender becomes very hard to clean but overall I like the product. I
  6. Quality
    they need to improve taste
    It helps to gain weights. But taste is not really good. After for a while its hard to drink that.
  7. Quality
    Great Price Greater Results!!
    I use this product after I workout to revitalize my body and energy. I occasionally take it before bed as well if I think I need an extra boost. Its effects are amazing. I gain muscle mass size and weight not fat.
  8. Quality
    Serious Mass: A Good Product
    I enjoy this product a lot. (The name cracks me up too.) There are days when I just can not get enough calories unless I eat during every waking hour. Having a glass or two of this after each meal helps quite a bit with the issue of constant hunger and also improves recovery time. Mind you I'm not a body builder so I don't know how well this would work for that. Serious Mass is also a real pain
  9. Quality
    By far best tried & true mass gainer
    Serious Mass is an effective "tried & true" quality mass gainer. It has been around for a while but still beats even its newer competitors. If you are truly a hardgainer like I am I recommend this product. It steps up where so many others fail. A hardgainer must 1st focus on getting in quality calories. This product provides at least 1250 calories per serving. Most other popular mass gainers on
  10. Quality
    Best by far
    Optimum nutrition is a few dollars more then the rest but by far it is the best in the industry.No one has come close to there protein powders.I am lactose intolerant and they are the only ones i know of that also caters to those who cannot eat or drink milk products!!

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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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