MASS XXX™ with MyoTor® - Chocolate (13 Servings)
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GNC AMP - Mass XXX Clinically Proven Weight Gainer Protein Powder - Chocolate
- 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•*.
- Choose A Third-Party Tested Mass Gainer: Mass XXX is certified by Informed Choice and regularly tested for over 285 banned substances in sport⬩.
- Shake Up Your Daily Macros: Enjoy any of Mass XXX’s flavors with cold water or milk in a shaker cup—or as part of a smoothie and blended with fruits, juices, peanut butter, or yogurt.
- Gluten Free
■In an eight-week, randomized, double-blind, placebo-controlled study of healthy male volunteers, 18 subjects completed 3 sets of resistance training (RT) daily + the macronutrient blend in Mass XXX™, and 16 subjects performed 5 sets RT daily with no supplement. After eight weeks, subjects on the supplement showed equal gains in body weight, fat free mass (FFM), maximal muscle strength (MMS) and muscle endurance (ME) with only 3 sets RT per day compared to the control group who completed 5 sets RT per day.
^When used in conjunction with an exercise program.
· 2 clinical studies have examined MyoTOR® for increasing muscle strength and endurance. In both 8-week studies, subjects participated in resistance training programs or voluntary exercise and consumed MyoTOR® or a placebo. The MyoTOR® groups showed significant increases in upper- and lower-body strength and muscle endurance compared to those who took a placebo.
⬩Informed Choice products are subject to a rigorous Anti-Doping program that includes protocols for testing & monitoring for over 285 compounds.
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Maltodextrin, Protein Blend (Whey Protein Concentrate, Calcium Caseinate, Soy Protein Isolate), Cocoa (Processed with Alkali), Medium Chain Triglicerides , Natural and Artificial Flavors, Lecithin, Salt, Sucralose, Acesulfame Potassium Contains: Milk and Soybeans
As a dietary supplement mix 4 scoops, (210g) with 16 fl. oz. of cold water or your favorite beverage. Consume 1-2 servings daily. On training days, consume post-workout. On non-training days consume first thing in the morning or between meals. Consume ample amounts of water while taking this product.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov., Notice: Product sold by weight not volume. Significant product settling may occur. ,
Disclaimer
While GNC strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by GNC.
Keep out of reach of children. Store in a cool and dry place.
General Nutrition
Corporation
Pittsburgh, PA 15222
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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.
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•Carbohydrates – 127g of carbohydrates fuel energy utilization during training and replace glycogen stores post-exercise. Carbohydrates also prevents the body from using protein as energy.
•Protein – 50 grams of fast, medium, and slow-digesting protein per serving, providing fuel for working muscle, recovery, and maximum gains^*.

•Creatine Blend – Creatine monohydrate and micronized creatine monohydrate join forces to fuel high intensity exercise and support muscle protein synthesis*.
•MyoTOR® - An herbal blend of Sphaeranthus indicus Flower Head Extract and Mangifera indica Bark Extract, clinically protein to improve muscle strength with half the exercise in as early as 2 weeks●♦*
•Creatine Precursor – This amino blend includes L-Arginine, L-Glycine, and Micronized L-Methionine, 3 precursors essential for creatinine synthesis.

•Micronized L-Arginine – Arginine is a precursor for synthesizing nitric oxide, proteins, and creatine – key components for fueling performance and gaining mass^*
•Micronized L-Leucine – An essential amino acid, Leucine is crucial to regulating muscle protein synthesis, fueling muscle cells, and supporting protein balance^*.

-Shawn S. Verified Purchaser

-Walter F. Verified Purchaser
What to expect taking Mass XXX



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is Right for You
MASS GAINER

PERFORMANCE

THERMOGENIC

NEUROSURGE

GNC AMP Mass XXX™ was formulated and clinically proven to gain muscle mass, when combined with a resistance training program and adequate calorie intake. Meeting your daily calorie goals to add muscle mass can be challenging, which is why GNC AMP Mass XXX™ helps you meet higher calorie requirements. Plus it includes clinically studied ingredients to help enhance your bulking goals and improve performance.
Yes! While GNC AMP Mass XXX™ was clinically studied in men, the formula was designed to support muscle growth and performance gains for anyone looking to enhance their goals^*.
For best results, use 1-2 times daily. On training days, consume one serving post-workout. On non-training days, consume one serving first thing in the morning or between meals as needed.
This product was intended to help your muscles recover and grow from your exercise program. It also includes ingredients to improve performance benefits. So, yes! Exercise is a critical tool to combine with this product. However, you can consume GNC AMP Mass XXX™ on non-training days to meet your calorie goals.