Improve brain function
Apart from making sure you are alert and active, green tea may also help augment brain function. Caffeine, which is the main ingredient in green tea, is a well-known stimulant. The quantity of caffeine in green tea isn’t as much as it is in coffee, but it is just enough to create a response without the negative effects associated with the intake of too much caffeine. Caffeine works on the brain, by obstructing adenosine [4], an inhibitory neurotransmitter. This causes an increase in the firing of neurons and the accumulation of neurotransmitters like norepinephrine and dopamine. Consistent research and study results [5] have shown that caffeine can boost several aspects of brain function including memory, mood, thinking capacity, and reaction time.
Another brain-improving property in green tea is an amino acid, L-theanine [6]. Studies show that the combination of caffeine and L-theanine can have very powerful effects in boosting brain function.