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Guarana Research The effects of long-term administration of guarana on the cognition of normal, elderly volunteers. An herbal supplement containing Ma Huang-Guarana for weight loss: a randomized, double-blind trial. Improved cognitive performance in human volunteers following administration of guarana (Paullinia cupana) extract: comparison and interaction with Panax ginseng. A double-blind, placebo-controlled, multi-dose evaluation of the acute behavioural effects of guaraná in humans. Improved cognitive performance and mental fatigue following a multi-vitamin and mineral supplement with added guaraná (Paullinia cupana). Effectiveness of guaraná (Paullinia cupana) for postradiation fatigue and depression: results of a pilot double-blind randomized study.



  

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