L-Theanine is an amino acid and one of the main ingredients found in green tea.
It works by effecting the levels of serotonin and dopamine in the brain. Increasing these levels can help enhance mood and cortisol levels which helps the body deal with stress.
In greet tea, L-Theanine gives an umami or savory taste. Research suggest that this umami taste helps suppress the feelings of hunger which can help aid weight loss.
Commonly used to promote relaxation without any drowsy side effects, when paired with caffeine L-Theanine helps to improve cognition and focus, this makes it a popular pre workout ingredient.