Green tea is known to keep you awake and it can make you smarter. Green tea sometimes has caffeine which is a stimulant. Green tea does not contain as much coffee but is has enough to make you not feel “jittery”. Caffeine blocks an inhibitory neurotransmitter called adenosine. Caffeine blocks an inhibitory neurotransmitter called adenosine. It increases the firing of neurons and neurotransmitters like dopamine and norepinephrine. Caffeine is known to greatly improve mood, vigilance, reaction time and memory. Green tea also has amino acids like L-theanine, and L-theanine increases the activity of the inhibitory neurotransmitter which is important when looking for the best green tea brand.
Caffeine and L-theanine have good brain function effects especially when they are combined. People have more stable energy and are much more productive when drinking green tea compared to coffee. Green tea has less caffeine than coffee but it is enough to produce an effect. Green tea can benefit the brain a great amount.