GNC AMP - Mass XXX™ Clinically Proven Weight Gainer Protein Powder - Vanilla
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
■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.
