[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\u202fcreatine HCL for cellular energy support. ENHANCE PHYSICAL ENDURANCE: Take on longer and more challenging workouts with FitNox to support long-lasting physical endurance and Nitrosigine which has been clinically studied to support arginine levels. BANNED SUBSTANCE TESTED PRE-WORKOUT: Compete with confidence knowing GNC AMP Tri-Phase is tested for over 285 banned substances.]