L-Theanine from PrimeSelf is a naturally occurring amino acid found in green tea, with the ability to cross the blood-brain barrier.
Theanine has been shown to be responsible for the calmative effects of Green Tea, which promotes relaxation while maintaining alertness and promotes healthy cognitive function.
This calmative state without sedation is what makes L-Theanine such a popular nootropic to combine other ingredients like caffeine, for "flow state" like results.
