גוארנה

[1] D.O.Kennedy, C.F.Haskell, A.B.Scholeya, Improved cognitive performance in human volunteers following administration of guarana (Paullinia cupana) extract: comparison and interaction with Panax ginseng. Pharmacology Biochemistry and Behavior, Volume 79, Issue 3, November 2004, Pages 401-411. doi.org/10.1016/j.pbb.2004.07.014
[2] Dimitrios Moustakas, Michael Mezzio, Branden R. Rodriguez,  Mic Andre Constable, Margaret E. Mulligan, and Evelyn B. Voura. Guarana Provides Additional Stimulation over Caffeine Alone in the Planarian Model. PLoS One. 2015; 10(4): e0123310. doi: 10.1371/journal.pone.0123310. PMCID: PMC4399916. PMID: 25880065

[3] Lina Yonekura, Carolina Aguiar Martins, Geni Rodrigues Sampaio, Marcela Piedade Monteiro, Luiz Antônio Machado César et al, Bioavailability of catechins from guaraná (Paullinia cupana) and its effect on antioxidant enzymes and other oxidative stress markers in healthy human subjects. Food and Function journal, issue 7, 2016
[4] Rafael Calixto Bortolin, Amanda Rodrigues Vargas, Vitor de Miranda Ramos, Juciano Gasparotto et al, Guarana supplementation attenuated obesity, insulin resistance, and adipokines dysregulation induced by a standardized human Western diet via brown adipose tissue activation. Wiley online library, doi.org/10.1002/ptr.6330