Drug Database - L-Theanine
Gamma-ethylamino-L-glutamic acid; derived from Boletus badius
and Camellia sinensis
L-theanine is also known as Suntheanine
Theanine is derived from tea leaves. Tea is native to eastern Asia and is a member of
the Theaceae family. This evergreen shrub or tree grows to over 9 m in height and is
pruned from 60 cm to 1.5 m for cultivation. Its dark green, serrated-edged leaves are
alternate and oval, while its white and fragrant blossoms appear singly or in clusters.
The chemical has also been isolated from the edible mushroom Boletus badius. The mushroom
is commonly found in late summer and autumn in the United States, and is reddish brown to
dark brick/brown in color with a 4 to 12 cm tall stem. The flesh is white to yellow in
color, and becomes a light blue/green color when cut or bruised.