Serious Mass Review
3.8Overall Score
Reader Rating: (1 Vote)

Optimum nutrition

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Most people that lift weights are looking to put on lean muscle mass. But if you’re a skinny person (commonly known as a ‘hard gainer’), you’re probably looking to put on sheer mass.

Mass gainers and bulking supplements have become a popular choice for people who are trying to gain weight and need a surplus of calories. Optimum Nutrition’s Serious Mass is one of the most popular mass gainers on the market today, but does it deserve such popularity? Or are we just looking at another case of too much hype?


Taste and Mixability:

Optimum Nutrition has some tasty supplements (check out our review of their whey protein Gold Standard), and this one is no exception…if you pick the right flavor. Most people love the chocolate flavor, but the strawberry and vanilla flavors are pretty rough on the taste buds. In terms of mixability, the texture is actually pretty chalky, which might turn off a few people from this supplement.

Serious Mass


Before our Optimum Nutrition Serious Mass review, we knew that mass gaining supplements were more expensive per serving than the average whey protein. Although the cost per serving is a little under $3.00, Serious Mass is still priced competitively compared to other mass gaining supplements, especially if you half the recommended serving size (which most people do) – it works out under $1.50.

With Optimum Nutrition, you can be pretty sure that you’ll get a respectable product. Serious Mass has a decent ingredient profile; it contains over 1,200 calories per serving which includes creatine, vitamins/minerals and high quality protein. It has everything you would want in a high quality mass gaining supplement. The only issue we could find in terms of value is that the recommended serving size is way too intense for the average recreational lifter.

The best price we found for 12lb was $47.95 at



Serious Mass delivers what it promises. At 1,250 calories per serving and 250 grams of carbohydrates, you will be able to pack on some size with this formula. Serious mass is a highly effective weight gain supplement perfect for any skinny guy or hard gainer.


Side Effects:

Since you are ingesting such large amounts of calories, there’s a chance you could experience stomach discomfort or bloating. You can always half the serving size; this should help to prevent bloating issues.

Make sure to have plenty of extra fiber in your diet if you start using this (thank us later). And as always, check with your physician before using this (or any) supplement.

For For

  • 25 essential vitamins and minerals per serving
  • 50g of blended protein per serving
  • 250g of carbohydrates per serving
  • Reputable and award winning company

Against Against

  • Quite a lot of artificial ingredients
  • High chance of stomach discomfort or bloating (you can half the serving size and add extra fiber to your diet to help prevent this)
  • Cost per serving is pretty high


Serious Mass – Our Verdict:

Optimum Nutrition’s Serious Mass is a solid mass building supplement designed for skinny people and serious hard gainers. Optimum Nutrition’s formula delivers a high calorie blend with 250 grams of carbohydrates and 50 grams of protein packed with muscle building creatine, L-glutamine and 25 essential vitamins and minerals. If you’re looking for a high calorie mass gainer, this would be a good place to start.

Didn’t find what you were looking for? Take another look through our mass gainer reviews; we’re sure you’ll find something you’ll like!

Remember to look at today’s best deals for Serious Mass before parting with any of your hard earned cash!

Per Serving (334g – 2 Scoops):

Calories: 1250
Calories from Fat: 40
Total Fat: 4.5g
Saturated Fat: 3g
Cholesterol: 75mg
Total Carbohydrate: 252g
Sugars: 40g
Protein: 50g
Vitamin C: 60mg
Vitamin D: 200 I.U.
Vitamin E: 30 I.U
Thiamin: 5mg
Riboflavin: 5mg
Niacin: 50mg
Vitamin B6: 5mg
Folic Acid: 400mcg
Vitamin B12: 20mcg
Biotin: 300mcg
Pantothenic Acid:100mg
Calcium: 730mg
Iron: 6mg
Phosphorus: 350mg
Iodine: 75mcg
Magnesium: 186mg
Zinc: 30mg
Selenium: 200mcg
Copper: 1mg
Manganese: 10mg
Chromium: 600mcg
Molybdenum: 150mcg
Sodium: 600mg
Potassium: 1230mg
Choline: 250mg
Inositol: 250mg
PABA: 5mg
Creatine Monohydrate: 1g

Other Ingredients: Complex Carbohydrates, Proprietary Protein Blend (Whey Protein Concentrate, Calcium Caseinate, Egg Albumen), Artificial Flavor, Serious Mass Vitamin & Mineral Blend (Potassium Phosphate, Choline Bitartrate, Magnesium Aspartate, Beta Carotene, Inositol, d-Calcium Pantothenate, Zinc Citrate, Ascorbic Acid, Boron Amino Acid Chelate, Niacinamide, Manganese Glycinate, Kelp, d-alpha Tocopherol Succinate, Ferrous Fumarate, Copper Gluconate, Thiamin Mononitrate, Riboflavin, Pyridoxine Hydrochloride, Para-Aminobenzoic Acid, Chromium Picolinate, Selenium Glycinate, Molybdenum Glycinate, Vitamin D3, Folic Acid, Biotin, Cyanocobalamin), Medium Chain Triglycerides, Creatine Monohydrate, Acesulfame Potassium.

Allergen Information: Contains Milk, Egg, Wheat, and Soy (Lecithin).

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