guarana

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gua·ra·na

(gwah-rah'nah),
A dried paste of the crushed seeds of Paullinia cupana (family Sapindaceae), a vine extensively cultivated in Brazil. It contains guaranine (caffeine), saponin, a volatile oil, and paullinitannic acid. Has been used to relieve headache.
[Native Brazilian word]
Farlex Partner Medical Dictionary © Farlex 2012

guarana

(gwă-ră-nă′) [Native Brazilian word]
A stimulant derived from Paullinia cupana, a Brazilian plant used in folk remedies for its supposed effects on alertness and cognition. The plant contains caffeine and other chemicals, but has not been proven to enhance thinking, treat dementia, or alter any neuropsychiatric functions.

CAUTION!

Because some guarana-based products have high levels of caffeine, care should be taken in their use to avoid caffeine overdose.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
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And it was Jack who stood shoulder-to-shoulder with me when a big blond grizzly spotted us and tried to bluff us out of a lush soapberry patch.
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I was relieved when Thomson drew my attention to the sage and dogbane at my feet and a waxwing posing on a ripe red soapberry bush nearby.
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I'd advise your readers to instead wash their clothes with soap nuts (also called soapberry).
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