Guarana is a native climbing evergreen vine found in the Amazon. It is a berry that has many uses, including increasing fat-burning ability and energy.
Guarana soft drinks are wildly popular in Brazil, and have been marketed in other countries around the world as energy drinks. It comes in other forms, including chocolate bars, chewing gum, powder, syrup and capsules. These products might be difficult to find outside of the Brazilian marketplace but can be found in some health food stores in the United States.