Ultra Premium Protein Blend
High Calorie Protein Powder to Support Muscle Growth
9.1  out of 10  (585 Reviews)
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Product Overview

BSN Bottle

Mass Gainer

  • Muscle Growth & Maintenance
  • Energy Yielding Metabolism(Calcium)
  • Supports Normal Muscle Function(Calcium)
  • Weight Gain Objectives

Push your performance past previous barriers.

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Ultra-Premium Protein/Carbohydrate Matrix

TRUE-MASS® is an ultra-premium mass gainer, designed to support muscle growth and recovery of normal muscle function after high intensity or long-lasting physical exercise. The formula behind TRUE-MASS® features a 2-to-1 ratio of workout-fueling carbohydrates to muscle building protein, with 90 grams of carbs per serving and 50 grams of protein at 700 calories. Plus, we included 6 grams of dietary fiber per serving and Medium Chain Triglycerides to round out the nutritional value of each shake and complement BSN®’s legendary great taste. Beneficial effects contributed by carbohydrate source are obtained with the consumption of carbohydrates, from all sources, at a total intake of 4 g per kg body weight, at doses, within the first 4 hours and no later than 6 hours, following highly intensive and/or long-lasting physical exercise leading to muscle fatigue and the depletion of glycogen stores in skeletal muscle.

Gain with the Best of Them!

TRUE-MASS® features BSN®’s signature ultra-premium protein formula to feed an athlete’s muscles with the essential protein need to promote growth. The unique carbohydrate blend provides the caloric support necessitated by extreme physical exertion, helping the body prepare for and support the recovery of normal muscle function. Healthy fats are also included in this formula to provide additional nutritional benefits. And all these high-quality ingredients come delivered with BSN®’s exclusive flavor technology, producing one of the most mouth-watering mass-gaining shakes on the market.


BSN®’s protein powders, such as Syntha-6® and Syntha-6® Isolate, are comprised primarily of protein and contain only small amounts of fats and carbohydrates, while staying under approximately 200 calories per serving. These protein powders are recommended to supplement protein intake through-out the day and as a post workout shake. While TRUE-MASS® is a perfectly good option for these applications as well, its strength lies in its formula of a 2-to-1 ratio of carbohydrates to protein, which is geared towards athletes who require an above normal caloric intake or who have a hard time meeting their caloric intake with a well-balanced diet alone.

BSN Supplementation

At BSN®, we have designed our products to complement one another. When used together, they can help enhance the overall benefits of your supplementation and workout regimen.

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Ratings & Reviews

Overall Rating
585 Ratings
Verified Buyer Rating
108 Ratings
Average Flavor Rating
6 Flavors
Top Rated Flavor
Manteiga de amendoim e chocolate
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Jul 15, 2019
Verified Buyer
  • 10 Cookies & Cream

People don't seem to like the Cookies and Cream as much as the others. But my 20 y.o. college student son loves it and his Mom and I have both commented on how good it smells when he is making his shakes.

Jul 08, 2019
Verified Buyer
  • 8 Chocolate Milkshake
  • 10 Vanilla Ice Cream

Great mass gainer. Really leaves you with that full, bloated feeling so i wouldn't recommend taking this before eating, but you will see results. this is my main tried-n-true protein i take. both flavors i rated are excellent, too. overall amazing protein! Tip: mix with milk, taste is 10/10

May 21, 2019
Verified Buyer
  • 10 Strawberry Milkshake

I have used the chocolate and the strawberry milkshake. I’m not that big on chocolate in general but it is still good but the strawberry milkshake is the best tasting protein I have ever had. It tastes exactly like a real strawberry milkshake.

Feb 25, 2019
Verified Buyer
  • 9 Strawberry Milkshake

By far best tasting protein shake I’ve had. It also does not make you bloated.

Feb 16, 2019
Verified Buyer
  • 10 Strawberry Milkshake

This stuff is great! I have tried many weight gainers and this is by far my favorite. It really feels like a clean gainer. I have bought this same tub so many times and have never looked back since the first time I used it. I started noticing some results in my goals only after a month using this product. I have not tried any other flavors besides strawberry but that is literally the best tasting protein shake I’ve ever had. I usually mix it with milk and add in other stuff. Overall awesome product. Ordered from this site on a Thursday night and got delivered to my house that Saturday afternoon! Thanks!

Nov 13, 2018
Verified Buyer
  • 8 Vanilla Ice Cream

Does anyone know where the sale by date is ?

Oct 07, 2018
  • 8 Strawberry Milkshake

Great Product

Sep 25, 2018
  • 8 Chocolate Milkshake

I’ve had one serving of this every day for probably 25 days, lifting 6 days a week, have gained almost 15lbs. Stuff works lol as long as you put in the work and still eat a lot of food

Jul 10, 2018
  • 9 Cookies & Cream
  • 10 Chocolate Milkshake

Great product, in the little time I have been taking this BSN item I can already see some mayor results. The taste of the Chocolate flavor its putty good and refreshing compared to other products that taste like medicine, not this item. Definitely recommend it!

Jun 29, 2018
  • 10 Chocolate Milkshake

I have tried a few mass gainers and this is by far the best. The flavor is fantastic and you can really tell the difference in the quality of the ingredients just from the taste. It mixes very well. Full serving (3 sccops) into a 28 oz blender bottle with blender ball and I have no chunks. Just a silky smooth 700 calorie meal. It is a little pricey compared to other products but if you are ok with paying more to enjoy it and make things that much easier to stay on track then I highly recommend True Mass.

Jun 02, 2018
Verified Buyer
  • 10 Strawberry Milkshake
  • 10 Vanilla Ice Cream

I’ve been consuming this particular protein for some years now and have been since. No need for another, the results are spectacular. As far as taste, there is no competition. Vanilla mixes well with anything, I personally mix it with an orange Gatorade to create the “creamsicle” shake. Keep up the outstanding work BSN.

May 11, 2018
  • 10 Chocolate Milkshake

Amazing Flavor, Great results !

Mar 26, 2018
Verified Buyer
  • 10 Chocolate Milkshake
  • 4 Cookies & Cream
  • 8 Strawberry Milkshake
  • 8 Vanilla Ice Cream

Overall great mass gainer, amazing flavors,Mix well with either milk or water.

Mar 16, 2018
  • 10 Strawberry Milkshake

I am currently using this shiiitt and let me tell you!! if you want some serious mass and not getting bloat and sick of drink a protein shake!! TRUE MASS is the real deal! I am from Mauritius and i guarantee you you will love it too.. thanks a lot BSN.

Aug 24, 2017
Verified Buyer
  • 10 Chocolate Milkshake

I used this gainer for nearly a month straight and gained close to 2 pounds. This is pretty good for me as I'm a hard gainer. The flavor was amazing and it mixed easily. Probably the easiest mixing and best tasting mass gainer I've had to date. Only con I have is that I wish this product had little less sugar and some cleaner ingredients. Other than that it's a good product.

1 Size
2.6 Kilograms
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4 Flavors
Chocolate Milkshake
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Was:  £39.99
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Price: £35.99  (£2.25 / Serving)
Flavor Rating: 9.4

What's in BSN True-Mass

5.82 Lbs. Chocolate Milkshake
Serving Size 4 Scoops (165 g)
Servings Per Container About16
Amount Per 165 g
Energy 2,955 kJ       
- 701 kcal       
Total Fat 18.5 g 27%
Of Which Saturates 5 g 25%
Total Carbohydrate 84.8 g 28%
Of Which Sugars 15.7 g 18%
Fiber 5.9 g
Protein 46 g 92%
Salt .83 g 13%
Calcium 370 mg 46%‡
Phosphorus 366 mg 53%‡
Sodium 328 mg
‡ Reference intakes of an average adult
† Recommended Reference Intake or Nutrient Reference Value not established
Protein Matrix Comprised Of (Whey Protein Concentrate#, Calcium Caseinate#, Milk Protein Isolate, Whey Protein Isolate#, Hydrolyzed Whey Protein Isolate#, Micellar Casein#, Egg Albumen, Glutamine Peptides [Gluten], (Emulsifier; Soy Lecithin), Maltodextrin, Creamer (Sunflower Oil, Maltodextrin, Sodium Caseinate#, Mono- & Di-Glycerides, Tocopherols, Tri-Calcium Phosphate), Fat Reduced Cocoa Powder, Flavoring [Milk], Thickeners (Polydextrose, Cellulose Gum, Xanthan Gum, Guar Gum, Acacia Gum), Medium Chain Triglycerides Powder (Medium Chain Triglycerides, Sodium Caseinate#, Emulsifier [Citric Acid Esters of Mono- & Di- Glycerides], Antioxidant [Mixed Tocopherols], Sweeteners (Acesulfame Potassium, Sucralose).
# From MILK

Directions For True-Mass: Mix 3 scoops with 16 oz of cold water or beverage of your choice. Vary the amount of liquid to achieve desired consistency. Drink 2-4 servings daily or as needed to satisfy your protein or mass gaining requirements. To increase your protein and calorie intake per serving and to acheive an amazing milk shake taste, use milk.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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