Pre-Workout Amped by Optimum Nutrition supports intense pump, explosive energy, improved reaction time, and laser focus from a nootropic blend with 300mg of caffeine plus Neumentix(r) , maximum pump with 6g of L-citrulline, and enhanced endurance with 3.5g of beta-alanine. It also contains an 890mg electrolyte blend to help replace what s lost through sweat during strenuous workouts. Designed for fitness junkies and performance athletes with intense training programs, this advanced, high-stim formula delivers an intense boost to help elevate your training and unlock your potential. With high-quality ingredients, easy mixing, and fruity flavors, it s everything you expect from Optimum Nutrition – The World s #1 Sports Nutrition Brand.