L-Theanine is a naturally occurring amino acid found in tea, such as black and green tea, and some mushrooms. L-theanine is long known as one of key nutrients within tea that helps support calmness and relaxation. However, its effects are not often associated with drowsiness, allowing L-theanine to be supplemented whenever the need occurs. L-theanine is also recognized and researched for providing help for mentally managing situations that can lead to anxiety for certain people.    Helps support a calm, relaxed mood May help with anxiety management May improve sleep quality May support mental focus