

GNC AMP Mass XXX, Clinically Proven Weight Gainer Protein Powder With Micronized Amino Acids, Creatine, Betaine, 780 Calories, 50g Protein, Strawberry, 13 Servings
Key item features
- Clinically Proven Gainer: 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
- Banned Substance Tested: Product was tested and monitored for over 220 banned substances on the 2020 World Anti-Doping Agency (WADA) Prohibited list via LGC skip lot testing.
- Backed By Science: Since 1935, GNC has been committed to meeting the highest standards of quality, safety, and efficacy while applying the most up-to-date advances in nutritional science so you can live well.
Specs
- BrandGNC
- FlavorStrawberry
- Vitamin & supplement typeProtein Supplements
- Size13 Servings
- Food formPowders
- Serving size4
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About this item
Product details
- Clinically Proven Gainer: 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
- Banned Substance Tested: Product was tested and monitored for over 220 banned substances on the 2020 World Anti-Doping Agency (WADA) Prohibited list via LGC skip lot testing.
- Backed By Science: Since 1935, GNC has been committed to meeting the highest standards of quality, safety, and efficacy while applying the most up-to-date advances in nutritional science so you can live well.
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Ingredients
Ingredients
Calories 800 , Total Fat 5 g , Saturated Fat 4 g , Cholesterol 100 mg , Total Carbohydrate 127 g , Total Sugars 15 g , Added Sugars 5 g , Protein 50 g , Calcium 475 mg , Iron 2 mg , Sodium 600 mg , Potassium 750 mg , Power Plus Blend 6.15 g , Betaine (as BETAPOWER®) 2.5 g , Creatine Blend (Micronized Creatine Monohydrate, Creatine Monohydrate) 2.5 g , MyoTOR® (Blend of Sphaeranthus indicus Flower Head Extract & Mangifera indica Bark Extract) 650 mg , Creatine Precursor Amino Blend (L-Arginine, L-Glycine, Micronized L-Methionine) 500 mg , Micronized Amino Acids (Glutamine as Micronized L-Glutamine, Arginine as Micronized L-Arginine, Leucine as Micronized L-Leucine) 500 mg
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Customer ratings & reviews
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Showing 1-3 of 70 reviews
Great to help you get started or restarted after a long hiatus from the gym.
[This review was collected as part of a promotion.] If you are starting out in the gym or coming back after a long hiatus, take this stuff. You will gain mass and you will see bigger lifts at the gym. The taste isn't too bad either, just make sure you shake it really well. I usually get allergic to headaches from general why protein, but I had no problems taking this. If I took a break for a bit, I would use this to help me build back mass for sure.
That I was treated good and GNC won't steer you wrong
I absolutely love everything about this product. The Mass XXX is the best way to go if you want to improve your strength, weight lifting, and like it says you will see results. I've put on 20 pound's in less than a month. I think it was 3 and a half weeks. So over all it's a great product for anyone even beginner's. And it's not 20 pounds of fat or fluid it's actually 100% muscle mass!
Smooth as silk, Strawberry tastes great
Strawberry tastes incredible and mixes extremely smoothly with milk or water. At 4 heaping scoops of this stuff, I assumed it would feel like drinking sand but its as smooth as can be. I just started using and am no professional builder, so will withhold my judgment of the effectiveness supplement-wise.
