Kennedy DO, Haskell CF, Robertson B, et al. Improved cognitive performance and mental fatigue following a multi-vitamin and mineral supplement with added guaraná (Paullinia cupana). Appetite. 2008;50(2-3):506-13.
Haskell CF, Kennedy DO, Wesnes KA, Milne AL, Scholey AB. A double-blind, placebo-controlled, multi-dose evaluation of the acute behavioural effects of guaraná in humans. J Psychopharmacol (Oxford). 2007;21(1):65-70.
Scholey A, Bauer I, Neale C, et al. Acute effects of different multivitamin mineral preparations with and without Guaraná on mood, cognitive performance and functional brain activation. Nutrients. 2013;5(9):3589-604.
De oliveira campos MP, Riechelmann R, Martins LC, Hassan BJ, Casa FB, Del giglio A. Guarana (Paullinia cupana) improves fatigue in breast cancer patients undergoing systemic chemotherapy. J Altern Complement Med. 2011;17(6):505-12.