Guarana seed has been used by indigenous Amazon tribes for centuries to help to reduce mental fatigue, and to help maintain mental awareness.It gains its energizing benefits from a number of actives that are found in the seed. These include caffeine and two other stimulants -theophylline and theobromine. The level of caffeine found in the recommended daily dose of GoGo Guarana (two capsules) is less that that found in a single cup of coffee!