Bucked Up 100 Series Pre Workout Highlights: The perfect solution for the stim-sensitive, who still want a sufficient energy boost. Limited to just 100 mg of caffeine, our 100 Series is everything you’ve come to expect from our high-quality pre-workout formulas- pump, focus, energy, hydration, endurance – without the side effects of loads of caffeine. Bucked Up® Pre-Workout was developed with two purposes in mind: to take your workouts to the next level, and be the best possible pre-workout on the market. We don’t use proprietary blends. We have nothing to hide. You won’t find ineffective doses of any ingredients in Bucked Up® Pre because we know you don’t want to pay for supplements that don’t work.