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Home > Living Well > Health Library > Guaraná for Sports & Fitness
Some athletes say that guaraná helps improve stamina.
Guaraná contains a substance similar to caffeine, which could be responsible for caffeine-like effects such as improving endurance performance. However, no research has directly tested guaraná in athletes.
Some athletes take guaraná during their training; however, there is no scientific research to support this use.
As with any caffeinated product, guaraná may cause insomnia, trembling, anxiety, palpitations, and urinary frequency.1 Guaraná should be avoided during pregnancy and breast-feeding.
Certain medicines interact with this supplement.
Guaraná (Paullinia cupana) is a plant with a high caffeine content. Combining caffeine drug products and guaraná increases caffeine-induced side effects.
Last Review: 05-23-2015
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