Optimum Nutrition (ON) SERIOUS MASS – 6LB

 3,309.00  2,899.00

  • Optimum Nutrition Serious Mass 6 lb Chocolate helps to provide 1,250 calories in every serving, which is ultimate in a weight gain formula
  • ON Serious Mass comes with 50g of blended protein in every serving of 334g
  • Optimum Nutrition Serious Mass 6 lb Chocolate comes packed with the benefits of 25 essential vitamins and minerals for explosive muscle growth
  • ON (Optimum Nutrition) Serious Mass 6 lb Chocolate comes with more than 250 grams of carbohydrates without any added sugar content
  • ON Serious Mass 6 lb Chocolate is enhanced with creatine, L-Glutamine and Glutamic Acid
  • This is a Non-vegetarian product.


Optimum Nutrition Serious Mass 6 lb Chocolate is a premium weight gain formula for those who are in need of those extra calories but are having a hard time consuming enough of them. With 1263 calories per serving and 50 grams of protein for muscle recovery, this Serious Mass is highly recommended for weight gain. With 1,263 calories and 50 grams of protein per serving for muscle recovery support, this weight gain formula from Optimum Nutrition makes it the ideal post-workout and between meals shake to aid you achieve your goals. ON Serious Mass help you in developing the physique you have always wanted.


50g of Protein Per Serving of 334g

While meeting 100% of your daily protein requirement, Optimum Nutrition Serious Mass 6 lb Chocolate is also fortified with 1263 calories and 254g of carbohydrates in every serving, which will help you gain healthy weight and lean muscle mass.

23 Essential Vitamins and Minerals

Optimum Nutrition Serious Mass 6 lb Chocolate contains 23 vital nutrients, which can help to fulfil your body’s nutritional requirement very easily. It comes with creatine, L-Glutamine, glutamic acid, Glutamine pepsides, Choline, Inositol, and MCTs that speed up your recovery phase, post-workout.


Add two heaping scoops of Optimum Nutrition Serious Mass 6 lb Chocolate to a blender filled with 24 oz (710 mL) of water. Blend for 45-60 seconds. Then add a few ice cubes and, if desired, other calorie-contributing ingredients and blend for an additional 30-45 seconds.


Mixing two scoops of Optimum Nutrition Serious Mass 6 lb Chocolate with 24 oz (710 mL) of nonfat or low fat milk instead of water will give you a thicker, creamier, higher-calorie shake. New users may find if 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.
Optimum Nutrition Serious Mass 6 lb Chocolate is a substantial weight-gain supplement that can be used to feed serious calorie needs in a variety of different ways.

Between Meals

Drink 1/2-1 serving of Optimum Nutrition Serious Mass Chocolate between meals to maintain positive nitrogen balance and support a high-calorie diet.


Begin drinking 1/2-1 serving of Serious Mass 30-45 minutes following exercise to support maximum recovery.

Before Bed

Drink 1/2-1 serving of Optimum Nutrition Serious Mass 6 lb Chocolate about 45-60 minutes before bed to provide nutrients to recovering muscle throughout the night.


For best results use Optimum Nutrition Serious Mass 6 lb Chocolate combined with intense weight training (3-5 times per week) and a sensible whole foods diet. Also, keep in mind that sufficient recovery between workouts impacts your ability to gain lean mass. Allowing at least 48 hours between workouts involving the same body parts is recommended.

From the manufacturer

6 reviews for Optimum Nutrition (ON) SERIOUS MASS – 6LB

  1. Vinod

    I have used ON whey. ON is always a recommended brand. Good product with additional vitamins. Started using it now. Let’s see the results after a month.

  2. Sammy

    It has been almost a month, taking it as described. Seems I have gained 500 Gms in this time. I cant say if ts 500 Gms gain as it should be checked in the next month.

  3. Nilesh

    Just a Send some sample to Laboratory. Its good. Price ia Best. Lets Hope its gonna Work. The Product is Good and Quality .
    About Use and Result write in a Month. Now 67 Kg Target Is 10+ Kg in Month I hope so

  4. Devbrat

    I am a total fan of Optimum Nutrition. All products from ON is best in class. I like serious mass a lot. But please don’t purchase too much. Please purchase that much you can consume.

  5. Deepak

    Undoubtedly the best mass gainer out there in the market. I have used most of the gainers to pack some pounds and have time and again come back to the good old Serious Mass for some effective growth of muscles.
    Inspire of all the complaints regarding bloating and feeling lethargic, which are common with every calorie dense mass gainer, this is hands down the best one to take for gaining requirements. It was my 3rd time with Serious Mass and it has not left any chance to fall short of my expectations. An easy gain of 5-6 pounds is something everyone would obviously get.
    Go for it and make sure to buy only the authentic ones.

  6. Inderpreet

    Recieved this product today, the delivery was on time… and most of all product was authentic with importer label and all details, not fake at all… i have never relied on other mass gainers as this has resulted best.. had bought 6lbs jar before and i gained 3kgs of pure mass with less fat.. did some shredding later and now back on bulk mode bought 12lbs cant wait to see the results again.. guys dont worry about lil extra fat that can be shredded later and for those r new to this or have digesting problem start by half scoop morning and half by night, later increase ur intake accordingly…and take some liv52 DS it will help better… good luck everyone let the gains begin!

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