Гуарана: растение Амазонки и источник энергии.

Species of tree

Guaraná (/ɡ//w//ə/'/r//ɑː//n//ə/ from the Portuguese guaraná ɡʷaɾɐˈna; Paullinia cupana, syns. P. crysan, P. sorbilis) is a climbing plant in the family Sapindaceae, native to the Amazon basin and especially common in Brazil. Guaraná has large leaves and clusters of flowers, and is best known for the seeds from its fruits, which are about the size of a coffee bean. As a dietary supplement or herb, guaraná seed is an effective stimulant: it contains about twice the concentration of caffeine found in coffee beans (about 2–8% caffeine in guarana seeds, compared to about 1–3% for coffee beans). The additive has gained notoriety for being used in energy drinks. As with other plants producing caffeine, the high concentration of caffeine is a defensive toxin that repels insects from the berry and seeds. The color of the fruit ranges from brown to red and it contains black seeds that are partly covered by white arils.

The word guaraná comes from the Guaraní word guara ná, which has its origins in the Sateré Maué word for the plant, warana, that in Guaraní means "fruit like the eyes of the people" or "eyes of the gods". The Guaranis make a herbal tea by shelling, washing and drying the seeds, followed by pounding them into a fine powder. The powder is kneaded into a dough and then shaped into cylinders. This product is known as guaraná bread, which is grated and then immersed into hot water along with sugar. This plant was introduced to European colonizers and to Europe in the 16th century by Felip Betendorf, Oviedo, Hernández, Cobo and other Spaniard chroniclers. By 1958, guaraná was commercialized.

In the United States, guaraná fruit powder and seed extract have not been evaluated for the status of "generally recognized as safe" (GRAS) by the Food and Drug Administration, but rather are approved as food additives for flavor (but not non flavor) uses. Guaraná is used in sweetened or carbonated soft drinks and energy drinks, an ingredient of herbal teas or contained in dietary supplement capsules. South America obtains much of its caffeine from guaraná.

Brazil, the third largest consumer of soft drinks in the world, produces several soft drink brands from the seeds of guaraná. A fermented drink is also prepared from guaraná seeds, cassava and water. Paraguay is also a producer of guaraná soft drinks with several brands operating in its market. The word guaraná is widely used in Brazil, Peru and Paraguay as a reference to soft drinks containing guaraná extract.

Guarana is a key plot device in the Murdoch Mysteries episodes "Excitable Chap" and "From Murdoch to Eternity", in which inventor James Pendrick creates an energy drink from a particularly potent strain of guarana, which is ultimately plowed under to make way for the Panama Canal.