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Optimum Nutrition Serious Mass
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Optimum Nutrition Serious Mass

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Serious Mass Facts - Seriously

Serious Mass is designed for the hard gainer. This can be anyone who has difficulty putting on weight or keeping the weight on. If this sounds familiar, don't despair. This calorie-loaded mass gainer is a great way to put away extra calories and protein each day. You might be gaining weight before you know it!


Serious Mass Gainer contains 50 grams of protein per serve from a blend of fast-acting and slow-release sources. This allows for a rapid response, yet with a prolonged release of amino acids into muscle.


Combined with a massive 252g carbs to fuel muscles, restore glycogen levels and enhance nutrient delivery, this product should have you stacking on kilograms in no time. With powerful nutrients like glutamine and creatine also in the mix, struggling to gain weight should be a thing of the past.


Serious Mass Calories

This product provides 1,640 calories per serve when taken with low fat milk. These are simple and convenient calories. Oh yeah, they're also delicious!




Optimum Nutrition Brand Banner Serious Mass



No one questions the nutritional authority of whey protein. This is why it's the first protein used in this product.


Whey protein is loaded with naturally occurring essential amino acids, which are potent stimulators of muscle protein synthesis 1,2. Protein synthesis is the creation of new muscle tissue protiens. This means more gains for you. Whey protein is particularly high in an essential amino acid called leucine. Leucine is a stimulator of mTOR, which is the spark that ignites muscle protein synthesis 3.  


Whether you're a novice or professional, Serious Mass will get you to your goal weight faster. You should notice some strength gains along the way too.




  1. Marshall, K. Therapeutic Applications of Whey Protein. Alternative Medicine Review, 2004 Vol 9;2 p.136-156
  2. Tipton K.D., et al. Stimulation of net muscle protein synthesis by whey protein ingestion before and after exercise. American Journal of Physiology-Endocrinology and Metabolism. 2007 E71-E76
  3. Norton L.E., & Layman D.K. Leucine Regulates Translation Initiation of Protein Synthesis in Skeletal Muscle after Exercise. The Journal of Nutrition. 2006 Vol 136 p.533-7




Does Optimum Nutrition Serious Mass Work?

Does a hammer work? If you use it properly! Serious Mass delivers quality protein with plenty of calories. If your goal is to gain size, strength or power, without necessarily having to stay lean, this product will deliver excellent nutritional support. Individuals who have difficuly gaining weight may even find that they can still stay lean whilst using this product.



How to Use Serious Mass

Add 2 heaped scoops into a large shaker or blender with aprroximately 700ml water, milk or low fat milk. Mix or blend and consume.



When to Take Optimum Nutrition Serious Mass

ON Serious Mass may be taken between meals or after exercise. For mass gaining programs, you may like to try taking a 1/2 to 1 serving in water, 1/2-1 hour before exercise.



Is Optimum Nutrition Serious Mass Safe?

It is always a great idea to check with your healthcare practitioner before beginning a mass gaining program, particularly one that involves dietary and exercise changes. This product is simply a powdered form of nutrition. This product is not recommended to replace meals; it is designed for use between regular meals. You may like to begin on 1/2 serve of Serious Mass gainer mixed with water if you commonly experience food intolerance or allergies. However, you should not use this product if you are allergic to milk or dairy products, gluten, egg or soy, or have lactose intolerance.

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Optimum Nutrition Serious Mass Nutritional Information

Serving Size: 334g (2 Heaped Scoops)(Banana)

Carbohydrates, total
- Sugars
Fat, total
- Saturated
Creatine Monohydrate


INGREDIENTS: Maltodextrin, Protein Blend (Whey Protein Concentrate, Calcium Caseinate, Egg Albumen, Sweet Dairy Whey), Cocoa (processed with Alkali), Natural and Artificial Flavors, Vitamin & Mineral Blend (Dipotassium Phosphate, Magnesium Aspartate, Dicalcium Phosphate, Calcium Citrate, Ascorbic Acid, Niacinamide, Zinc Citrate, Beta Carotene, d-Calcium Pantothenate, d-alpha Tocopherol Succinate, Selenomethionine, Copper Gluconate, Ferrous Fumarate, Manganese Amino Acid Chelate, Thiamin Mononitrate, Pyridoxine Hydrochloride, Riboflavin, Chromium Picolinate, Folic Acid, Biotin, Molybdenum Amino Acid Chelate, Cholecalciferol, Potassium Iodide, Cyanocobalamin), Acesulfame Potassium, Lecithin, Medium Chain Triglycerides.


ALLERGEN INFORMATION: Contains milk, egg, wheat (glutamine peptides) and soy (lecithin).


Optimum Nutrition Serious Mass Nutrition Facts

serious mass nutritional information