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MASS XXX™ with MyoTor® - Chocolate (13 Servings)
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MASS XXX™ with MyoTor® - Chocolate (13 Servings)
MASS XXX™ with MyoTor® - Chocolate (13 Servings)
$86.99
($6.69 / serving)
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MASS XXX™ with MyoTor® - Chocolate (13 Servings)

379984
379984 379984
$86.99
($6.69 / serving)
  • PRO ACCESS BOGO 50% Off Mix-and-Match UPGRADE NOW
    close popup
    Offer valid on GNC.com and at participating stores through May 7, 2026. Buy 1, get 1 of equal or lesser value 50% off. Mix and match. Select products only. Must add 2 eligible items to cart for discount. Exclusions may apply. See a Coach in store for details or click on "SHOP NOW" to view specific products included in the sale. GNC PRO ACCESS members only.
In stock

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LOCAL RESTRICTIONS

Due to local weight loss supplement and muscle-building supplements regulations, persons under the age of 18 are prohibited from purchasing this item.

An adult must be present to provide a signature and valid ID upon delivery or pick up in-store.

For New York residents, a $4.99 delivery fee is added in checkout.

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Gluten Free
Gluten Free

MASS XXX™ with MyoTor® - Chocolate (13 Servings)

ITEM # 379984

GNC AMP - Mass XXX Clinically Proven Weight Gainer Protein Powder - Chocolate

GNC AMP Mass XXX mass gainer combines high-quality protein powder, key nutrients, and science-backed MyoTOR, creatine, and BETAPOWER—to fuel proven performance.
  • Clinically Proven Gainer: GNC AMP Mass XXX™ mass gainer combines high-quality protein powder, key nutrients, and science-backed innovations—including MyoTOR®, creatine, and BETAPOWER®—to fuel proven results and performance^▪*. 
  • Increase Mass With 40% Fewer Sets: Delivers 50g of protein, including naturally occurring EAAs, plus carbs, and healthy fats—and it’s clinically proven to help get better results out of workouts▪*. 
  • Improve Muscle Strength In As Early As 2 Weeks: MyoTOR is clinically proven to accelerate improvements in strength with as little as 2 weeks of training and included in every serving of Mass XXX mass gainer•*. 
  • Improve Stamina: Take resistance training to a new limit with MyoTOR’s clinically studied support for improved muscle endurance and BETAPOWER’s athletic performance benefits•*. 
  • Third-Party Tested: Trusted by athletes around the world, our formula features a completely transparent label and is third-party tested for banned substances and protein content⬩.
  • Gluten free, no artificial colors
Serving Size: About Four Scoops (208 g)
Servings Per Container: 13

Per Serving
IngredientAmountDV % *

Calories770
Total Fat†6g8%
Saturated Fat†4g20%
Trans Fat0g**
Cholesterol100mg33%
Total Carbohydrate†127g46%
Dietary Fiber4g14%
Total Sugars8g**
Added Sugars4g8%
Protein50g100%
Calcium475mg37%
Iron4mg22%
Sodium580mg25%
Potassium550mg12%
Creatine Monohydrate*3g**
Betaine Anhydrous (as BetaPower®)*2.5g**
MyoTOR®*650mg**
Sphaeranthus indicus Flower Head Extract, Mangifera indica Bark Extract
Creatine Precursor Blend*500mg**
L-Arginine240mg**
Glycine240mg**
L-Methionine20mg**

* Percent Daily Values are based on a 2,000 calorie diet.
** Daily Value (DV) not established.

 

Serving Size

4

Servings Per Container

13

Other Ingredients

Maltodextrin, Whey Protein Concentrate, Micellar Casein, Cocoa Powder (Processed with Alkali), Milk Protein Isolate, Natural & Artificial Flavors, Medium Chain Triglycerides, Salt, Sucralose, Sunflower Lecithin, Guar Gum, Cellulose Gum, Xanthan Gum, Steviol Glycosides, Silicon Dioxide, Shellac, Citric Acid.

Allergen Warnings

Contains: This product contains milk.

Directions

As a dietary supplement, mix 4 scoops with 16 fl. oz. of cold water or your favorite beverage. On training days, consume post-workout. On non-training days, consume first thing in the morning or between meals.

Warnings

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. Keep out of reach of children

California Residents: WARNING - Cancer and Reproductive Harm. www.P65Warnings.ca.gov/Food

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.

Storage

Store in a cool, dry place.

Licensing

Distributed by:
GNC Holdings, LLC
Pittsburgh, PA 15222 USA

BetaPower® is a trademark of IFF or its affiliates.
MyoTOR® is a registered trademark of PLT Health Solutions and Laila Nutraceuticals, LLC. US Patent #9,907,825 and international patents pending.

Note: This product cannot be shipped to Canada , Japan , Singapore
Shipping Methods And Costs

At checkout, you will be prompted to choose a shipping method for your item(s). Shipping costs are dependent on the items in your order and the shipping method you select. Your total shipping charges will automatically compute during checkout prior to the completion of your order.

If you are shipping within the United States, you will have the option of upgrading your shipping method for faster delivery (Standard, Expedited or Overnight). If you choose to upgrade your shipping method, your order must be received and clear credit authorization by 4:00 p.m. EST or your order may not be processed until the following business day. Business days are Monday-Friday, excluding observed holidays within the United States.

Shipping Rules and Restrictions
  • Orders are shipped on business days only. Business days are Monday-Friday, excluding observed holidays within the United States.
  • You will not be charged for any item until it is shipped to you.
  • Please call a Customer Service Specialist at 1-877-GNC-4700 if you have any questions.
30 Day Money-Back Guarantee

We want you to be fully satisfied with every item that you purchase from www.gnc.com or from an Authorized GNC Retailer. 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, handling, gift wrap, or other 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.

Our Standard Return policies do not apply to all items. For a list of exceptions to our Standard Return policies click here.

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