L-theanine is an amino acid found primarily in green and black tea and some mushrooms.
Theanine, also known as L-Î³-glutamylethylamide and N -ethyl-L-glutamine, is an amino acid analogue of the proteinogenic amino acids L-glutamate and L-glutamine and is found primarily in particular plant and fungal species.
L-theanine is an amino acid naturally found in plant sources such as tea leaves and some mushrooms. L-theanine benefits include helping to support alertness, relaxation, and sleep. The appeal of L-theanine stems from its ability to support a state of alert relaxation, so it can calm you down without causing drowsiness.
Tea is the most widely consumed beverage in the world after water. Tea is known to be a rich source of flavonoid antioxidants. However tea also contains a unique amino acid, L-theanine that may modulate aspects of brain function in humans.
Better mental focus. Many people drink black or green tea while at work, believing that it boosts their mental focus.