The Guarana (Paullinia Cupana) is a shrub with fast growth originating of Brazil and other countries of Amazonia, having small yellow flowers and fruits containing seeds. The name of this shrub comes from Guarani, natives of Amazonia, who used seeds of Guarana, collected with maturity, to make a stimulative drink famous to have virtues aphrodisiacs. Today, Guarana (natural and not hybrid variety) are employed in many preparations containing plants, like a powerful energy factor, stimulating the activities physical and cerebral and acting like anti-stress and anti-tiredness. It gets a feeling to be well and stimulates the desire and the sexual functions as well for the man than the woman.