Elaine; Questtion on L-THEANINE and serotonergic neurons
 

http://www.taiyointernational.com/Su...e_Research.asp

Suntheanine induced reduction of brain serotonin.
Yokogoshi H, et al. Biosci Biotechnol Biochem. 1998 Apr;62(4):816-7.

Effect of Suntheanine on norepinephrine and serotonin levels.
Kimura R, et al. Chem Pharm Bull (Tokyo). 1986 Jul;34(7):3053-7.

Effect of Suntheanine Intake on Learning Ability.
Terashima T. et al. Fourth Shizuoka Forum on Health and Longevity.

etc...

One study says it increases serotonin, one says it decreases.

How about golf performance? ;-)

"Effect of brain alpha wave activity and golf performance by
Suntheanine. "
Kim K, Yum K, Lee Y. Int'l Symposium on Food, Nutrition and Health,