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GNC AMP Mass XXX, Clinically Proven Weight Gainer Protein Powder, Improves Strength and Size, 780 Calories, 50g Protein, Micronized Amino Acids, Creatine, Betaine, Vanilla, 13 Servings, 6 Pounds
✅ In stock
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Grade
Analysis Confidence
48%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
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Price verified Sep 23, 2026 8:20 AM · Prices & availability subject to change
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📝 Product Overview
🚚 Shipping
Free Shipping
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
⚙️ Specifications
Brand
GNC
Flavor
Vanilla
Item Weight
2724 g
Product Benefits
Supports overall health and wellness by providing essential nutrients and targeted ingredients for daily vitality and specific health needs.
Unit Count
96 Ounce
Protein Source
Casein, Soy, Whey
Number of Items
1
Item Dimensions
7.99 x 7.99 x 12.4 inches
Brand Name
GNC
Package Type Name
Canister
Age Range Description
Adult
