Guarana

This is a climbing plant in the maple family, native to the Amazon basin and especially common in Brazil. Guarana features large leaves and clusters of flowers, and is best known for its fruit, which is about the size of a coffee bean. As a dietary supplement, guarana is an effective stimulant and its seeds contain about twice the concentration of caffeine found in coffee beans (about 2–4.5% caffeine in guarana seeds compared to 1–2% for coffee beans). As with other plants producing caffeine, the high concentration of caffeine is a defensive toxin that repels herbivores from the berry and its seeds.

If you look at the contents of any energy drink, chances are that guarana is listed as one of the main ingredients. European missionaries in 17th-century Brazil recorded the native people’s use of the berry, noting that it not only gave them energy, but allowed them to go for days without feeling hungry. It became a colonial trading commodity that was said to help protect the body from illness, but too much of it was known to cause insomnia.

The caffeine that is found in the guarana berry is thought to be different from the caffeine found in coffee. Guarana contains chemical components called tannins, which are thought to produce a longer-lasting effect than caffeine from other sources. For centuries, guarana berry seeds have been powdered or smoked in a long process that is done by hand. Drinking properly prepared guarana can be central to formal occasions and gatherings, where groups of people pass around a calabash bowl.