5% Nutrition Kill It 30srv5% Nutrition's Kill It is an all in one pre workout that gives you everything you need to crush it in the gym. Though Kill It contains less stimulants compared to other pre workouts, it still packs a punch! Kill It contains 250mg of caffeine per serving along with several other high quality ingredients to allow for long lasting energy, intense pumps, laser focus, and increased levels of strength and endurance. This makes Kill It a great first choice