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ON Serious Mass Gainer (2722 g)


ON Serious Mass Gainer (2722 g)

By buying this product you can collect up to 3 loyalty points. Your cart will total 3 points that can be converted into a voucher of 1.50 CHF.

No Sugar Added Weight Gain Supplement

More details...

Promotion -30%

34.95 CHF

instead of 49.90 CHF

Availability : Available

Warning: Last items in stock !

Serious mass gains require serious amounts of calories and Serious Mass delivers with 1250 calories per dose making your goal of gaining weight much easier!

Very often, those who want to gain weight are those who have the hardest time doing so, due to fast metabolism, weak appetite or busy lifestyles that make it impossible to eat large quantities often.  Serious Mass ON fights these difficulties, offering 1250 to 1600 calories per shake, a very high quantity of high quality calories.

To give you an idea, each Serious Mass shake offers:

  • 1250 calories if mixed with water or 1600 calories if mixed with milk
  • 50 grams of protein from both quickly and slowly digested sources such as whey casein and eggs
  • 250 grams of carbohydrates to provide energy for intense workouts and maintain glycogen reserves- without added sugar
  • 24 essential vitamins and minerals, with B vitamins and antioxidants
  • Fortified with glutamine and creatine

Optimum Serious Mass is the ultimate solution for gaining weight, gaining mass and creating muscle.  Serious Mass is a quality, economical weight gainer from Optimum Nutrition with high quantities of all the necessary ingredients, with reduced sugar and fat.

Its delicious formula allows you to drink shake after shake without getting tired of it.  It's a versatile gainer with smooth flavors that allow you to combine and try out other ingredients and explore new flavors, adding more calories.


Maltodextrin, Dextrose, Whey Protein Concentrate, Micellar Casein, Ultrafiltrated egg protein, Aromas, Creatine Monohydrate, Taurine, MCT oil, Citric Acid, Malic Acid, Gum Arabic, Xanthan Gum, Sodium Carboxymethylcellulose, L-ascorbic acid (vitamin C), dl-alpha-tocopheryl acetate - vit. E, D-Biotin, retinyl acetate - vit. A, Calcium D-Pantothenate, Pantothenic Acid, pyridoxine hydrochloride - vitamin B6, cholecalciferol - vit. D, pteroylmonoglutamic acid - folate, Thiamin Mononitrate, Riboflavin (Vitamin B2), cyanocobalamin - vit. B12, Sodium Citrate, Acesulfame K, Sucralose, Cyclamates, Soy Lecithin, carmine, E150c, E133.


Add two heaping scoops (334g) of Serious Mass to a blend with 650-750ml (23-25 oz) of cold water or milk. Blend for 30 - 45 seconds. Then add a few ice cubes and, if desired, other calorie-contributing ingredients and blend for an additional 30-45 seconds.

Tips: Mixing two scoops of Serious Mass with 710 ml (24 oz.) of nonfat or low fat milk instead of water will give a thicker, creamier, higher calorie shake. New users may find it beneficial to begin with 1/2 of a serving daily for the first week and then gradually increase to 1 or more full servings several times a day. 
Serious Mass can be used to feed serious calorie needs in a variety of different ways. 

Between Meals: Drink 1/2 - 1 serving of Serious Mass between meals to support a high-calorie diet. Post-Workout: Begin drinking 1/2 - 1 serving of Serious Mass 30-45 minutes following exercise. Before Bed: Drink 1/2 - 1 serving of Serious Mass about 45-60 minutes before bed to provide nutrients to muscle throughout the night.   


Contains gluten, milk and soy. Contains egg ingredients.



This product should be used in conjunction with proper diet and exercise. Keep out of reach of children. Store in a cool, dry place, away from direct sunlight.


We recommend you see a physician or nutritionist if you have any questions regarding the use of our product. Nutritional information may vary depending on flavor. Images presented are merely for illustrative and promotional purposes only. The product's final image may be altered.

  • Flavour 2: Vanilla
  • Best before: 10.2022
  • Flavour 3: Chocolate
  • Flavour 4: Banana
  • Best before: 09.2022
  • Flavour 5: Strawberry

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