The Guarana (Paullinia cupana) is a shrub the berries of which contain an active substance helping to break down excessive fat in human body. The places of natural occurrence of this herbal plant are in some regions of South America, mostly in Brasilia, Uruguay and Venezuela. Its fruits are red capsules containing one dark blackish seed embedded in a red pulpy aril. Guarana is well-known for its stimulating effects, similar to those of coffee but its active substances are absorbed gradually. It is quite often added to food supplements designed to help manage or reduce body weight.