Gnc amp tri-phase multi-action pre-workout - lemon lime - proven to enhance muscle performance & endurance • multi-action pre-workout formula: amplify every stage of your workout with tri-phase technology to power mental stimulation, physical performance, and long-lasting endurance. • power mental stimulation: gnc amp tri-phase pre-workout gets you in the zone with an immediate boost from caffeine anhydrous and keeps it going with sustained-release caffeine from xtenergy™ p2 coffee bean extract. • fuel muscle energetics: push high-intensity stages of your workout even harder with peakatp® for muscle energetics, carnosyn® beta-alanine to increase carnosine levels, a critical muscle fatigue controlling factor, and con-cret® creatine hcl for cellular energy. • enhance physical endurance: take on longer and more challenging workouts with fitnox® to long-lasting physical endurance and nitrosigine® which has been clinically studied to arginine levels. • banned substance tested pre-workout: compete with confidence knowing gnc amp tri-phase is tested for over 285 banned substances. . Gnc amp tri-phase multi-action pre-workout - lemon lime (30 servings)