This fruit potentially improves blood circulation which promotes better mental health. A high content of tanins and saponins working along with caffeine may contribute to the effect on mental health.In a study, twenty participants consumed multivitamins with or without guarana and a placebo. Cognitive performance and an increased benefit of mood was noted in those individuals having taken the multivitamin containing guarana. In a previous study participants experienced increased alertness and mood as well as improved secondary memory. However, changes could not be determined from the caffeine alone. Also of note, better blood circulation offers relief from headaches and migraines.Next
