[CLINICALLY PROVEN STRENGTH AND MASS 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 LEAN MUSCLE MASS WITH 40% FEWER SETS: Mass XXX’s macronutrient blend 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 ENHANCED FOR IMPROVED STRENGTH AND 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: Unlike most mass gainers with proprietary blends Mass XXX is certified Banned Substance Tested and formulated to help you gain mass without compromising your goals]