Out of 10
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Ultra Premium Muscle Mass Gainer*
Supports Muscle Growth, Muscle Protein Synthesis, and Recovery*
Supported Goal: Weight Gainers
Main Ingredient: Whey Protein
8.8 out of 10  (579 Reviews)
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  • 16 Servings
  • $2.50 / Serving
  • In Stock
  • Flavor Rating: 9.1
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For a limited time, buy 1 BSN True-Mass, 5.82 Lbs. in the flavor of your choice & get 1 BSN Beta-Alanine, 300 Grams, Unflavored FREE!

Product Overview

Weight Gainer Supplement of the Year
BSN Bottle

Mass Gainer

  • Muscle Size & Strength*
  • Energy Yielding Metabolism*
  • Exercise Recovery
  • Weight Gain Objectives

Push your performance past previous barriers.

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Ultra-Premium Protein/Carbohydrate Matrix

TRUE-MASS® is an ultra-premium lean mass gainer, designed to support muscle growth and muscle recovery for athletes with above normal caloric needs.* 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. Used post-workout, between meals and/or before bed, TRUE-MASS® can fuel your recovery from heavy training while providing the nutrients your body needs to keep on building.

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 building blocks.* The unique carbohydrate blend provides the caloric support necessitated by extreme physical exertion, helping the body prepare for and support recovery from intense training.* Healthy fats supply quick-burning fuel to satisfy the serious athlete’s energy demands.* 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 recovery 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 in a given day.

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

Out of 10
True-Mass Reviews
579 Total Ratings
Write a Review
Write a Review
    9.2 | 88 Ratings
    8.8 | 4 Flavors
  • 9.2
    Strawberry Milkshake
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Out of 10

Love the flavor. A lot more than ON's mass gainer's flavors. I just started using it, but it left me unbloated and didn't give me the runs like ON's mass gainer did. Would highly recommend if able to afford. PS: Not bashing ON. Most of my products are ON, but when it comes to mass gainers I would stand by BSN.

  • 10Strawberry Milkshake
Out of 10

This gainer was recommended to me by a friend of mine. Before, ordering I weighed 135 lbs., so my friend advised me to use this to gain more muscle mass because that is what I was looking for. After finishing the jar, I now weigh 141 lbs. and have noticed more muscle where I wanted it. The chocolate milkshake flavor is amazing and the best shake I have ever tasted!!

  • 10Chocolate Milkshake
Out of 10

Very good product. Helps gain weight and tastes a lot better then most proteins on the market. Very necessary for hard gainers

  • 10Vanilla Ice Cream
  • 8Strawberry Milkshake
  • 7Chocolate Milkshake
Out of 10

Giving this a 9 because I like to mix my whey protein and weight gainers in milk but with this its way to clumpy, so use water and it's fine. 10/10 on chocolate though

  • 10Chocolate Milkshake
Out of 10

I have been using Pro Jym, but needed more calories for before workouts. This has been the best high carb/calorie protein I have ever used. I have made more hard gains in three weeks than the previous month. Well worth the money.

  • 9Chocolate Milkshake
Out of 10

helped me gain 6kgs (~4kgs muscle) in 3 months taking one serving a day, one scoop morning, 2 scoop before bed, and one scoop post workout, paired with whole foods of course. great supplement to give you healthy calories for a bulk.

Out of 10

No written review.

  • 10Chocolate Milkshake
Out of 10

This is a rating from a 27 year old who used this product when I was 19 and 20. That was back in the days when I was 140 lbs soaking wet just trying to gain weight. It works great. I would eat 3 meals a day and have a shake after each meal. Then another after my workout. It helped me put on 40 lbs in just over 4 months. Was it healthy? No. Was it all muscle? I am sure not. Di it help the skinny kid who couldn't gain weight no matter what put on enough to look like he belonged in the gym? Yes. So if u are just looking to put on weight this might be for you. If you are looking to gain muscle and keep your toned body you might want to look else where.

  • 10Cookies & Cream
  • 10Chocolate Milkshake
Out of 10

Great macros tastes great gained 3 pounds in 3 weeks with it

  • 10Chocolate Milkshake
Out of 10

Love the flavor. A lot more than ON's mass gainer's flavors. I just started using it, but it left me unbloated and didn't give me the runs like ON's mass gainer did. Would highly recommend if able to afford. PS: Not bashing ON. Most of my products are ON, but when it comes to mass gainers I would stand by BSN.

  • 10Strawberry Milkshake
Free Item
5.82 Lbs.$39.99
16 Servings | $2.50 Per Serving
Flavor Taste Availability
Chocolate Milkshake 9.1 In Stock
Cookies & Cream 8.0 In Stock
Strawberry Milkshake 9.1 In Stock
Vanilla Ice Cream 8.8 In Stock

What's in BSN True-Mass

5.82 Lbs. Chocolate Milkshake
Supplement Facts
Serving Size3Rounded Scoops(165g)
Servings Per ContainerAbout 16
Amount Per Serving
Calories 700
Calories From Fat 150
% Daily Value†
Total Fat 17g 26%
Saturated Fat 4g 20%
Trans Fat 0g
Cholesterol 130mg 43%
Sodium 300mg 13%
Potassium 900mg 26%
Total Carbohydrates 90g 30%
Dietary Fiber 6g 24%
Sugars 14g
Protein 46g 92%
Vitamin A 0%
Calcium 50%
Phosphorus 50%
Vitamin C 0%
Iron 41%
Magnesium 25%
† Percent Daily Values are based on a 2,000 calorie diet Your daily values may be higher or lower depending on your calorie needs
Protein Matrix Consisting Of (Whey Protein Concentrate, Calcium Caseinate, Milk Protein Isolate, Whey Protein Isolate, Micellar Casein, Hydrolyzed Whey Protein, Egg Whites, Glutamine Peptides), Maltodextrin, Sunflower Powder (Sunflower Oil, Corn Syrup Solids, Sodium Caseinate, Mono- And Diglycerides, Dipotassium Phosphate, Tricalcium Phosphate, Soy Lecithin, And Tocopherols), Cocoa Processed With Alkali, Natural & Artificial Flavors, Polydextrose, MCT Powder (Medium Chain Triglycerides, Non-Fat Dry Milk, Disodium Phosphate, And Silicon Dioxide), Lecithin, Cellulose Gum, Xanthan Gum, Guar Gum, Acacia (Gum Arabic), Acesulfame Potassium, Sucralose.
Contains Milk, Egg, Wheat And Soy (Lecithin) Ingredients.

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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