In a double-blind, placebo-controlled balanced crossover trial, 30 healthy adults were subjected to mental and cognitive tasks followed by a “mental fatigue” scaling score. When subjects were given a single dose of 200 mg of Panax ginseng there were significant improvements in mathematic tasks and significantly reduced mental fatigue scores after mental activities.
References:
Reay JL, Kennedy DO, Scholey AB. Single doses of Panax ginseng (G115) reduce blood glucose levels and improve cognitive performance during sustained mental activity. J Psychopharmacol. 2005 19(4): 357-65
