Dymatize prew. O. Is a pre-workout formula that will turn your workouts into extraordinary experiences. Unleash super-intense workouts and explosive training sessions while enjoying an unmatched flavor experience. Amplify the intensity of your workouts with citrulline malate, nitrosigine, teacrine, beta-alanine and caffeine. Dymatize prew. O. Is engineered to support your goals and make each workout count.