TrueGain Mass Gainer
RSP Nutrition

TrueGain Mass Gainer , 2.7 Kilograms Chocolate

A mass gainer shake packed with 1,210 calories per serving of RSP protein, 240g of carbs, and 10g of naturally occurring BCAAs.*
Crank up weight gaining macro levels for hardgainers or bodybuilders looking to add lean muscle with this RSP mass gainer.* Designed for muscle growth and powerful recovery with BCAAs and L-glutamine to repair, recovery, and grow muscles.*
9.0  out of 10  (17 Reviews)
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Product Overview


Premium Mass Gainer

TrueGain Bags

Performance Benefits*

Muscle Icon

Gain Mass*

50g Protein + 1,100+ Calories + 230g+ Carbohydrates

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10g Naturally Occurring BCAAs + 8g Naturally Occurring Glutamine & Glutamic Acids

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Muscle Growth*

50g Protein

RSP Athlete on Battle Ropes


Muscle Icon Mass Gainer*
Heart Icon Post-Workout Recovery*
TrueGain Bags

TrueGain is the premium lean weight gainer. Powered with a massive dose of over 1,100 calories, 230 grams of carbohydrates and 50 grams of protein, TrueGain is the ideal solution to fuel muscle growth, support quality weight gain, and maximize recovery.*

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Ratings & Reviews

TrueGain Mass Gainer
Overall Rating
17 Ratings
Verified Buyer Rating
2 Ratings
Average Flavor Rating
2 Flavors
Top Rated Flavor
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.
Sep 11, 2020
Verified Buyer

I’ll tell you right now if you’re eating 4-6 meals a day on top of drinking this stuff you WILL absolutely not only gain weight but put on some serious gainz. But don’t get me wrong, the vanilla flavor is dog s***. BUT, put this stuff in a blender with ice, almond milk, 1 banana, scoop of peanut butter and some Hershey syrup, you’ll transform this flavor into the best tasting gainer smoothie you’ve ever tasted. I love drinking this stuff only in a ‘smoothie form’ with the added Ingredients I stated above. And the scooper, it’s huge. It’s like, 3 normal size protein scoopers in 1 and you need two scoops for the full 1200 cal and 50 grams of protein. I mix everything with a wooden spoon in my blender before I actually start my blender, If I don’t, it clogs up and doesn’t mix well. Don’t sleep on this stuff, if your diet is on point and you need some extra calories at the end of your day, this is a must have! You’ll be super full and very satisfied after drinking this. I recommend this stuff 100%

May 04, 2020
Verified Buyer

Hot ****! I have always hated vanilla flavored anything, I always stick with chocolate but wanted to try this and **** is it good! It’s kinda like tapioca pudding flavor, super creamy and just really good even with just water. I love it! Haven’t taken it long enough to really say anything about putting on size yet though

Nov 08, 2019

I bought truegain strsight from the rsp nutrition site and here's my review. 1 . Chalky was the vanilla but somehow good lol. 2. Half serving is 25g of protein 600 calories

Oct 22, 2019

Truegain is a great product! It helps me to gain some weight. Will use this product again! Good job RSP!

Oct 14, 2019

Good product. Vanilla was pretty good. Mixes well and turned out very smooth. Very good gainer.

Oct 09, 2019

I have been messing around with other gainers lately. Most of them make me feel bloated and heavy. I tried this one due to a recommendation from a friend. After 2 weeks I could see a big difference in muscle fullness without feeling bloated and sluggish. I enjoy drinking this every morning with some almond milk, banana, and peanut butter. Amazing stuff!

Oct 05, 2019

Excellent product, I could see the results and I loved it, it tastes pretty good.

Oct 01, 2019

Very smooth. It mixes extremely​ well and I like drinking it with my morning coffee.

Sep 29, 2019

Rsp is the only brand, I have found, that creates amazing chocolate AND vanilla flavors. They aren’t chalky or gritty. They mix well and taste amazing. I truly feel a difference in performance and recovery when added to my diet as opposed to not using it.

Sep 28, 2019

If you are trying to put on mass then true gain is absolutely the right formula for you and it doesnt give you that nasty stomach bloat that others have given me as well the flavor profile is actually chocolate not chalk.

Sep 27, 2019

I was out of the gym for two months since then i been using true gain, my road to muscle recovery has been fast with this product. I usually take it before bed time so it gives me a better recovery and muscle growth.

Sep 27, 2019

Love all of RSP products! There True Gainer is perfect for someone trying to put on the the right way!

Sep 27, 2019

Haven't been disappointed with any product from RSP. This is just another good supplement to have. Great taste and really helps with the caloric intake

Sep 27, 2019

Big fan of RSP nutrition, from their whey-trueGain. Just recently tried the chocolate flavor TrueGain as a post workout supp and it’s been great! It Mixes well, and it’s great way to get those extra calories in! Definitely recommend.

Sep 27, 2019

Use to help with my calorie intake. Mixes well. Tried vanilla, great taste. Another good lean product from RSP.

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2.7 Kilograms
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Price: £18.05  (£2.26 / Serving)
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Flavor Rating: 9.9


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Crank up weight gaining macro levels for hardgainers or bodybuilders looking to add lean muscle with this RSP mass gainer.* Designed for muscle growth and powerful recovery with BCAAs and L-glutamine to repair, recovery, and grow muscles.*

What's in RSP Nutrition TrueGain Mass Gainer

Serving Size 2 Scoops (320 g)
Servings Per Container8
Amount Per Serving
Calories 1,210       
%Daily Value *
Total Fat 6 g 8%
Saturated Fat 3 g 15%
Trans Fat 0 g       
Cholesterol 155 mg 52%
Sodium 480 mg 21%
Total Carbohydrate 241 g 88%
Dietary Fiber 3 g 11%
Total Sugars 27 g       
Includes 11 g Added Sugars 22%
Protein 50 g 100%
Vitamin D 1.2 mcg 6%
Calcium 950 mg 73%
Iron 3.8 mg 21%
Potassium 890 mg 19%
The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
Maltodextrin, Milk Protein Concentrate, Whey Protein Concentrate, Dutch Process Cocoa, Whey Protein Isolate, Natural & Artificial Flavor, Creamer (Sunflower Oil, Maltodextrin, Sodium Caseinate, Dipotassium Phosphate, Monoglycerides, Diglycerides, Soy Lecithin, Sodium Silica Aluminate, Tocopherols), Flaxseed, Salt, Xanthan Gum, Soy Lecithin, Sucralose
Contains: Milk and Soy

Directions For TrueGain Mass Gainer:

Training day: Mix 16-20 oz of water with 2 full scoops and consume in the morning and after workout.

Off day: Mix 16-20 oz of water with 2 full scoops and consume between meals.

Warnings: Use this product as a food supplement only. Do not use for weight reduction. Store in room temperature, in a dry place.

* 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.