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Optimum Nutrition Serious Mass

Where to Buy ON Serious Mass

Serious Mass Weight Gainer Overview

With over a thousand calories per serving, this product packs one heck of a weight-gaining punch, and with five different flavors available you’re never going to be short of awesome tasting shakes to keep your strength and size gains coming month after month.

ON Serious Mass provides a whopping 50g of protein and 252g of carbohydrates per serving, for a total of 1250 calories with only 4.5g of fat, most of which comes from high-quality medium chained triglycerides.

Let us not forget the additional ingredients such as creatine, glutamine, and minerals.

What’s in Optimum Nutrition Serious Mass?

There are a lot of ingredients in Serious Mass so hold onto your hats and let’s take a look:

  • Maltodextrin
  • Protein Blend – containing Whey Protein Concentrate, Calcium Caseinate, Egg Albumin, and Sweet Dairy Whey
  • Medium Chain Triglycerides or MCTs
  • Creatine Monohydrate
  • L-Glutamine
  • Glutamine Peptides
  • Choline Bitartrate
  • Inositol
  • PABA (Para-Aminobenzoic Acid)
  • Vitamin A
  • Vitamin B6
  • Vitamin B12
  • Vitamin C
  • Vitamin D
  • Vitamin E
  • Thiamin
  • Riboflavin
  • Niacin
  • Folic Acid
  • Biotin
  • Pantothenic Acid
  • Calcium
  • Iron
  • Phosphorous
  • Iodine
  • Magnesium
  • Potassium
  • Zinc
  • Sodium
  • Copper
  • Manganese
  • Chromium
  • Molybdenum

on serious mass nutrition label

Taking Serious Mass

Use two heaping scoops added to 24oz of chilled water. This product can be used in a food processor or shaker, providing you use enough water.

It is generally recommended that first-time users begin by using just one scoop to test your gastrointestinal tolerance to some of the ingredients. Once you are comfortable after a few days you can begin to increase your intake.

Serious Mass can be used in between meals, post-workout, or even before bed; basically, chug some whenever you feel like your body could do with a massive heap of calories.

Note: Speak with your doctor before taking this product and always follow the manufacturer’s instructions on the label.

Are There Any Precautions?

If you are diabetic, suffer from severe insulin resistance, or are currently using any forms of OTC or prescription medication then you are strongly advised to consult with your doctor or physician before using Serious Mass.

Each serving packs a significant amount of carbohydrates, much of which comes in the form of fast-digesting sugars, so those of you who are already holding onto a lot of body fat will probably want to opt for whole food sources with plenty of lean protein and fibrous vegetables.

This product contains creatine so you are advised to consume it with a large amount of water.

Women who are pregnant or nursing are advised not to use Serious Mass.

Available Flavors and Serving Sizes

Optimum Nutrition Serious Mass is available in the following flavors:

  • Banana
  • Chocolate
  • Chocolate Peanut Butter
  • Strawberry
  • Vanilla

It is also available in the following serving sizes:

  • 3lbs
  • 6lbs
  • 12lbs

It’s great to see the serving sizes scaled as they are, although you should be aware that some flavors are limited to certain serving sizes, so you’ll want to double-check that your preferred flavor is available before making your final purchase.


Sometimes when it comes to really pushing the envelope and putting on a lot of size, many of us may need to resort to eating less-than-ideal foods, but regularly compromising on food quality just to ‘get the calories in’ is not always the best way to go.

For this reason, It is recommended that if you are going to purchase a weight gainer shake like ON Serious Mass then educate yourself on the purpose of the primary ingredients to make sure it is something that you really need.

Is it Worth the Money?

This kind of shake is more than suitable for those of you who are on a tight time budget and provides a quick and easy way to consume 1,000+ calories within a matter of seconds. Although it’s a bit costly, you do get what you pay for. Skip on this product if you are not in need of this many calories.

Of course, those of you who are really struggling on this front would stand to benefit from getting in a lot of calories in the form of a convenient product like Serious Mass.

Wrapping Up

Serious Mass really is for those of you who are either eating thousands of calories on a daily basis while training hard and not seeing any weight gain.

This does not mean all you 150lb ‘hard gainers’ who eat two or three times a day and wonder why you aren’t gaining any weight; it means those of you who are legitimately training your butts off while eating tons of food a day with no results.

Very few of you will have such ‘hot’ metabolisms that you need to consume such an obscene amount of food at a bodyweight below 200lbs, but if you’re being honest with yourself about needing a product like Serious Mass then the quality and popularity definitely speak for themselves.

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