SKU: 66007558035

GNC AMP Mass XXX Weight Gainer Protein Powder — 780 Calories, 50g Protein, 6 lb

Sale price$171.50 Regular price$190.55
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Description

GNC AMP Mass XXX Weight Gainer Protein Powder — 780 Calories, 50g Protein, 6 lbGNC AMP Mass XXX is a calorie dense weight gainer powder designed for athletes and active individuals who want to support muscle growth and training intensity with a convenient, protein packed shake. Each serving delivers 780 calories and 50g of protein, complemented by carbohydrates and healthy fats to help you meet daily goals while you train. Key ingredients and what they may support Mass XXX combines clinically studied ingredients such as MyoTOR,

GNC AMP Mass XXX is a calorie-dense weight gainer powder designed for athletes and active individuals who want to support muscle growth and training intensity with a convenient, protein-packed shake. Each serving delivers 780 calories and 50g of protein, complemented by carbohydrates and healthy fats to help you meet daily goals while you train.

Key ingredients and what they may support

Mass XXX combines clinically studied ingredients such as MyoTOR, creatine, and BETAPOWER, included in every serving to align with performance-oriented goals when paired with training. The formula also features naturally occurring EAAs to help support recovery as you work toward your routines.

  • High-energy formula with 780 calories per serving fuels longer, harder sessions.
  • 50g of protein per serving supports daily protein goals along with workouts.
  • Carbs and healthy fats round out the macronutrient profile for balanced energy.
  • MyoTOR, creatine, and BETAPOWER are included to support training-related performance in combination with training.
  • Banned-substance testing is conducted to align with WADA guidelines via LGC skip-lot testing.

Mass XXX is designed to help you get more from your workouts by delivering a robust protein and energy blend, with the potential to improve training efficiency and outcomes when used as part of a consistent program.

How it fits into your routine

  • Use as a post-workout shake or daily meal supplement on heavy training days for convenient calories and protein.
  • Each tub contains 13 servings in a 6-pound package, making it easier to plan a mass-gain approach.
  • Mix with water or milk for a shake that integrates smoothly into your day.

Safety, quality, and how to set expectations

GNC notes third-party testing to monitor for prohibited substances on the 2020 World Anti-Doping Agency (WADA) Prohibited List, via LGC skip-lot testing, providing an added layer of safety for athletes who are mindful of product integrity.

FAQ

Q: What is GNC AMP Mass XXX and who is it for?

A: A high-calorie weight gainer powder designed to support muscle growth and training goals for athletes and active individuals.

Q: Will I see results without training?

A: Mass XXX provides calories and protein to supplement your routine; consistent resistance training and nutrition are still needed for changes in size and strength.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 66007558035

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CLJ_WV
Massapequa, US
★★★★★ 5
Excellent Work-out & Biking Short
Special Size: 7" Inseam without Pockets, Size: Small, Color: Ocean Blue
I love these biker shorts. They have just the right amount of lycra and they are super soft. They are true to size, and they fit perfectly on my 5'2", 125-pound frame. I purchased them for use in bike riding, and I am very pleased with the fit and stretch. The inseam length is perfect for bike riding, and the legs don't ride up my thigh. The only con to all the pros is there isn't a phone pocket. I ride my bike around town, and I would have liked to have a pocket for my phone when going inside a store. These shorts are well worth the price. I purchased three different colors and love them all. I would definitely purchase this item again.
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Reviewed in the United States on January 7, 2026
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Amanda
Los Angeles, US
★★★★★ 4
Cute but could use some pockets
Special Size: 6" Inseam Contrast Trim without Pockets, Size: Small, Color: Navy/White
Obsessed with these shorts. They are so cute and comfy. They fit true to size and I love that there is a matching top you can buy separately. I feel like the material is pretty thick and I don't have to worry about it being see through. My only complaint is that there are no pockets.
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Reviewed in the United States on June 2, 2026
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Alecia
Birmingham, US
★★★★★ 5
Perfect workout shorts!
Special Size: 5" Inseam without Pockets, Size: Medium, Color: Black
Very comfortable and soft material. Great price! Perfect for workouts! Doesn't ride up or have constant pulling on them!
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Reviewed in the United States on March 19, 2026
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anpsmom2
Battle Creek, US
★★★★★ 5
Nice fabric
Special Size: 7" Inseam with Pockets, Size: X-Large, Color: Taupe
These are well made. The fabric is perfect! Not thin. I was disappointed that I ordered a size that was too large. I had to return. I need to get updated body measurements before reordering.
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Reviewed in the United States on May 17, 2026
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Stefan
Houston, US
★★★★★ 5
Buy buy buy!!!!
Special Size: 7" Inseam with Pockets, Size: Large, Color: Taupe
Fantastic! I got These a while back k in another color and needed another pair. I got the green, can you say wow! This color is beautiful and bright! They are as comfortable as my other ones! Worth every dime!
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Reviewed in the United States on June 5, 2026

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