Definition of Nootropic, Stamina:
Any agent [that] improves brain stamina ... by increasing the availability of neurotransmitters, enzymes, hormones, ... O2 delivery, or stimulating neural activity [Segen2012];
Any agent [that] improves brain stamina ... by increasing the availability of neurotransmitters, enzymes, hormones, ... O2 delivery, or stimulating neural activity [Segen2012];
Nootropic
Gotu Kola (Centella asiatica)
[Segen2012] Segen's Medical Dictionary. © 2012 Farlex Retrieved June 5 2016 from http://medical-dictionary.thefreedictionary.com/nootropic.