Re-Built Mass XP - Peanut Butter (CA Only)Peanut Butter | GNC
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Beyond Raw® Re-Built Mass XP (California Only)


Item # 826408
Gluten Free Gluten Free
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Product Information



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. LEARN MORE ABOUT THE INGREDIENTS:
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.


Nutrition Facts
Serving Size  3 Scoops
Servings Per Container  11

Amount Per Serving     % DV

Calories 880  

Total Fat 9g   12%
  Saturated Fat 6g   30%
Cholesterol 75mg   25%
Total Carbohydrate 140g   51%
  Dietary Fiber 1g   2%
Total Sugars 5g  

Calcium 520 mg   40%
Iron 1 mg   6%
Magnesium 490 mg   117%
Sodium 550 mg   24%
Potassium 500 mg   11%

Advanced Creatine Complex, Total  9 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 L-Arginine   1 g   **
Micronized Glycine  1 g   **
Micronized L-Methionine  1 g   **
Hyper-Anabolic Complex  19.3 g   **
   BCAA   **
   BETAPOWER® Betaine Anydrous   **
   Calcium HMB (Calcium beta-Hydroxy beta-Methylbutric Acid)   **
   Digestive Enzyme Blend (Aminopeptidase (135,000 LAP), Protease (45,000 HUT)   **
BCAA Blend  16.1 g   **
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.
Other Ingredients
Beyond Raw Carb Blend, Protein Blend (Whey Protein Isolate, Whey Protein Concentrate, Calcium Caseinate, Hydrolyzed Whey Peptides), Natural and Artificial Flavors, Beyond Raw Fat Blend, Lecithin, Acacia (Gum Arabic), Cellulose Gum, Salt, Sucralose, Acesulfame Potassium, Polydextrose, Cocoa (Processed with Alkali) , Annatto (color), Turmeric (color)
CONTAINS: Milk, Soy.
Label (click image to enlarge)

How To Use

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.
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, (State of California Prop 65) This product contains a chemical known to the State of California to cause birth defects or other reproductive harm.
Distributed by
General Nutrition Corporation
Pittsburgh, PA 15222


4.1 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rebuilt Mass CP
Great product. Consistent use creates consistent gains. Definitely worth it and in my opinion chocolate tastes the BEST! Vanilla is good too
October 11, 2018
2 months ago
Amazing taste!!! Really good if you mix it with water.
Vanilla flavor taste awesome with water, not recommend that much with milk, is too concentrated, watching results, I used to weight 140 lbs, now I weight 155 lbs(5 months)
I recommend this protein powder.
September 5, 2018
Make sure you drink the vanilla and you drink it before you work out everything it for 2 years now and if you drink more than 2 scoops with milk you will fart all day drinking with water very good . Tasted very good expensive though lower price
April 3, 2018
One scoop measurement?
First day of going to try the product but I could not find a scoop in the tub. How much would “one scoop” calculate to in cups or tablespoons? does anyone know?
March 12, 2018
Cancer survivor
March 9, 2018
Great product
January 16, 2018
11 months ago
Taste is not bad, I've used this product for about 1year and 6 months, plus the protein they have too. I usually do half serving on morning and other half before bed. I have gain 50lbs of mass in a year and a half of using this product. Working out Monday -Friday, no missing my meals. And most important part try not eating out too much. Watch your diet.... :) thanks for the good product
August 24, 2017
About taste
Taste not so good nd don't know it's safe because this product is raw
August 11, 2017
Buy the Chocolate one
I have been using this for the past 2-3 months. One bottle will last you around 11 days, I usually drank this post workout after eating a little something.


The chocolate flavor seems to be the most drinkable, I was able to get it down most days just fine. Just wouldn't recommend mixing it with something else.

I also gained 25 lbs in 2 months using this and working out 5 days a week. It didn't seem to stress my body too much and I'm liking the results.

The BAD:

The one downside is if you drink this stuff on an empty stomach, you better be prepared to be a bit gassy. Be sure to drink lots of water and eat some good fiber with this stuff otherwise you'll stop being popular in public haha.
August 7, 2017
Tastes Horrible
Hard to see results when it's impossible to drink. This product is by far the worst protein powder I've ever tasted and I've tried everything. It smells like dog food and tastes like puréed sidewalk chalk. It's hard to imagine a mass gainer can taste so bad considering they aren't trying to keep the calories to a minimum.
April 27, 2017
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Browse 3 questions Browse 3 questions and 6 answers
What is the best time to take it?
A shopper on Mar 7, 2018
BEST ANSWER: I usually take it in the morning and right away after working out. Vanilla flavor is great.
Is there any dairy or dairy derivatives in this?
OjOwne on Oct 28, 2018