Re-Built Mass XP - ChocolateChocolate | GNC

Beyond Raw® Re-Built Mass XP


Item # 826389


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Size: 6 lb(s)

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Hyper-Anabolic Mass Gainer
Built By Science. Driven By Obsession. Elevated Through Innovation.
If it's on our labels, then it's in our bottles. The ultimate gainer for mass, power and size.*
Proven Ingredients. Proven Doses. Clinical Quality. Real Science. Real Results.

Re-Built Mass XP is a hyper-anabolic, high-protein, high-calorie mass gainer targeted to engorge muscles for the ultimate mass power and size subjects seek. Featuring a high-leucine protein blend and an advanced creatine complex, it is scientifically designed for maximum effect.

MAXIMUM MUSCLE SUPPORT: Features clinically studied components shown to improve muscle size, stamina, and strength. Loaded with 60g of protein to fuel ripped muscles and 140g of high-quality carbohydrates to support massive gains.
ANABOLIC FUEL: With clinically dosed whey and leucine blend shown to trigger anabolic recovery, improve post-training anabolic response, boost post-training insulin for anabolic recovery, and impact key genes in muscle tissue required for muscle growth, recovery and repair.
  • Carbs: Includes high-quality complex carbohydrates to fuel high-intensity exercise.
  • Protein: Supplies 60g of high-quality whey protein, including whey protein isolate, whey protein concentrate, calcium caseinate, and hydrolyzed whey protein. Adequate amounts of protein are crucial to supporting subjects’ muscles and keeping a positive nitrogen balance.
  • Fat: Features a prime combination of MCTs, canola, and CLA powders.
Re-Built Mass XP contains clinically studied components shown to improve muscle size, performance and strength.
  • Features a complex carbohydrate blend to fuel high-intensity exercise.
  • Built with an Advanced Creatine Complex, including two varieties of creatine and a blend of creatine precursors to fuel the body’s natural synthesis of creatine.
  • Included within this anabolic matrix is the clinically studied 20 / 6.2 whey-Leucine blend demonstrated to increase muscle size and performance.
  • Clinically studied Opuntia Extract provides additional anabolic support. When combined with Leucine post-exercise, Opuntia Extract has been shown to positively modulate insulin response. Insulin is an important signaling molecule to further support anabolic recovery.
  • Collectively, this formula is scientifically designed to enhance muscle size, strength, performance and power.

Label (click image to enlarge)


As a dietary supplement, mix three scoops with 16 fl. oz. of cold water. Consume one serving daily. For best consistency, mix in a blender. Consume ample amounts of water while taking this product.
CONTAINS: Milk, Soy.


Consult your physician prior to using this product if you are pregnant, nursing, taking medication, or have a medical condition. Discontinue use two weeks prior to surgery. , Do Not Use For Weight Reduction

Other Ingredients

Beyond Raw Carb Blend, Protein Blend (Whey Protein Isolate, Whey Protein Concentrate, Calcium Caseinate, Hydrolyzed Whey Peptides), Cocoa (Processed with Alkali), Natural and Artificial Flavors, Beyond Raw Fat Blend, Lecithin, Acacia (Gum Arabic), Cellulose Gum, Salt, Sucralose, Acesulfame Potassium, Caramel Color
Distributed by
General Nutrition Corporation
Pittsburgh, PA 15222

Nutrition Facts

Serving Size  3 Scoops
Servings Per Container  11

Amount Per Serving     % DV

Calories 880  

Total Fat 9g   14%
  Saturated Fat 4.5g   22%
Cholesterol 60mg   20%
Total Carbohydrate 140g   47%
  Dietary Fiber 6g   24%
Total Sugars 4g  

Calcium 530 mg   53%
Iron 6 mg   33%
Magnesium 600 mg   150%
Sodium 720 mg   30%
Potassium 1080 mg   23%

Advanced Creatine Complex, Total  10 g   **
Creatine (2.5g as Creatine MagnaPower® (Magnesium creatine Chelate) and 2.5g as Micronized Creatine Monohydrate)  5 g   **
Micronized Guanidinoacetate (GAA)  1 g   **
Micronized alpha-ketogluterate (AKG)  1 g   **
Micronized L-Arginine   1 g   **
Micronized Glycine  1 g   **
Micronized L-Methionine  1 g   **
Hyper-Anabolic Complex  19.3 g   **
   BCAA   **
   Calcium HMB (Calcium beta-Hydroxy beta-Methylbutyric Acid)   **
   Digestive Enzyme Blend (Aminopeptidase (135,000 LAP), Protease (45,000 HUT)   **
BCAA  16.1 g   **
   L-Leucine   **
   L-Isoleucine (as Micronized L-Isoleucine)   **
   L-Valine (as Micronized L-Valine)   **
L-Leucine (as L-Leucine, Whey Protein Isolate, Whey Protein Concentrate, Calcium Caseinate, Hydrolyzed Whey Peptides)  8.9 g   **
L-Isoleucine (as Whey Protein Isolate, Whey Protein Concentrate, Calcium Caseinate, Hydrolyzed Whey Peptides)  3.7 g   **
L-Valine (as Whey Protein Isolate, Whey protein Concentrate, Calcium Caseinate, Hydrolyzed Whey Peptides)  3.5 g   **
Betaine (as BETAPOWER® Betaine Anhydrous)  2.5 g   **
HMB (Calcium beta-Hydroxy beta-methylbutyric acid)  500 mg   **
Digestive Enzyme Blend (aminopeptidase (135,000 LAP) and protease (45,000 HUT))  225 mg   **
Protein  60 g   **

** Daily Value (DV) not established.


4.2 / 5.0
18 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Not worth it
I bought this to try something new. i was intrigued by this have BCAA and Creatin in it, and it was only a little more than the ProBuilder weight gainer i usually buy. Its really not worth it, i find it harder to mix, thick and chalky and you end up drinking these massive shakes that leave me with a gut ache and burbs the rest of the day. I will be going back to Probuilder.
November 29, 2017
Response from GNC
Timothy, we are sorry to hear about your experience with the Re-Built Mass EP. Please accept our apology for the experience you had with the product. We want you to be fully satisfied with every item that you purchase from If you are not satisfied with an item that you have purchased, you may return the item within 30 days from the order date for a full refund of the purchase price, minus the shipping and handling charges. The item must be returned, unused or used, in good condition, in original boxes (whenever possible), and with all paperwork and accessories to ensure full credit.
You may also want to visit your local GNC store and speak to one of our associates who can find the best product for your needs.
November 30, 2017
John TStaff
September 22, 2017
3 months ago
Started 10 aug 2017 142,6lbs. Today 7 sept 2017 151lbs. I tried plenty of mass gainer but only this working for me.
Very good;)
September 7, 2017
Stomach Problems
I have taken re-built mass xp for four days I mix whit water and some milk and I feel like I'm having problems with my stomach.
August 20, 2017
Amazing product!!
This was my first mass gainer ever works amazing !! I gained several pounds me being hard to gain weight this has been helping me out so good everyone sees the difference I have the chocolate flavor that one is ok after a while you get over the flavor but over all I recommend this to anyone really good CHECK IT OUT!!
August 17, 2017
Is the protein suppose to taste like this like it has a strong kinda taste I got the chocolate flavor.
July 31, 2017
New Flavor Not as Great
I have used this product for a few years and although I do not take it daily, or workout as often as some people, I continue to see positive results. It's a heck of a shake, 880 calories.

The only negative I have at this point is they have done away with my favorite flavor, Chocolate Brownie. It seems that they brought it back for a while and now it is gone again... Going to have to get on eBay and buy a few before they are all gone. Please bring back that flavor! The new chocolate tastes alright, but nowhere near as great as the chocolate brownie!
July 28, 2017
Highly Recommend!
This was the first mass gainer I've taken in a while, and I must say I'm impressed. i'm going to stick with this product when I want to bulk! Highly recommend this to those that wish to bulk up! The Strawberry flavor is delish
July 25, 2017
Very very impressed! Best time to buy is when they have big sales going on in the store
This is the best protein I've ever taken! Packed on plenty of muscle and strength. Instead of mixing 3 scoops, I break it down and mix 1.5 scoops in the am, and 1.5 after I workout. I mix mine with a spoonful of peanut butter! Taste a whole lot better and add more protein.
July 21, 2017
I have to say this stuff taste good ! I will go back to GNC and talk to the guys and see what they suggest next if I should keep on using this or try something else.
July 20, 2017