1st Endurance PreRace Capsules 90ct: PreRace is a revolutionary pre-exercise supplement developed to provide endurance athletes with a potent mental and cardiac jump-start prior to races or workouts. The Pre-race formula provides all the necessary ingredients needed to increases mental stamina, increases time to exhaustion, increases maximum workload, improves mental clarity and increases oxygenation of muscles. Features include caffeine, taurine, qurcetin and a proprietary neuro-stimulant blend. PreRace comes as a flavor free powder which can be added to any pre-exercise or during exercise drink, like EFS. PreRace Clinical Study on a 40k Time Trial.