> L-theanine is a non-protein amino acid mainly found naturally in the green
> tea plant (Camellia sinensis). L-theanine is the predominant amino acid in
> green tea and makes up 50% of the total free amino acids in the plant.
> ...
> L-theanine is a unique free form amino acid found only in the tea plant
> ... L-theanine is a relaxant that increases
> alpha-waves producing mental and physical relaxation decreasing stress and
> anxiety, without inducing drowsiness.
> ...
> The unique aspect of theanine is that it acts as a non-sedating relaxant
to
> help increase the brain's production of alpha-waves (those associated with
> "relaxed alertness"). This makes theanine extremely effective for
combating
> tension, stress, and anxiety-without inducing drowsiness. By increasing
the
> brain's output of alpha waves, theanine is thought to control anxiety,
> increase mental focus, improve concentration, and promote creativity.

I'll bet a nickel that ethological studies would reveal that theanine was
put there by Darwin not for us, but for the benefit of animals that feed on
animals that feed on camellia sinensis. Imagine this internal dialogue of a
yak or monkey: "Gee, I feel relaxed. Think I'll eat more of these leaves.
That tiger over there looks pretty relaxed too - guess I needn't worry about
him. Wonder if he wants to be my friend? Guess I'll go over there and say
hello."

-DM