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.
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: 05-01-2013
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