MRM Nutrition Driven™ Pre-Workout Boost Mixed Berries Flavored is a pre-workout formula, designed for the professional athlete and highly active individual. This formula features three specialized blends for healthy muscles, hydration and energy. These synergistic ingredients—including B vitamins, beet powder, Peak ATP and more—help increase energy, stamina and optimal performance. Just add to water and drink 30 minutes prior to exercise. With caffeine from green tea.