L-theanine – Promote Relaxation and Reduce Stress
L-theanine is an amino acid that helps promote a restful, relaxed state without diminishing daytime alertness.* Its free of the side effects commonly associated with other relaxing agents and can be used to aid in stress management.
During a study of human volunteers, L-theanine promoted the generation of alpha brain waves, an indication of relaxation.* Another small, controlled clinical trial suggests that L-theanine supports a healthy stress response.* Results of yet another human trial suggest that L-theanine may act via the sympathetic-medullary system, either in addition to or instead of the hypothalamic-pituitary-adrenal axis.* L-theanine has long thought to interact with the binding of L-glutamic acid to glutamate receptors in the brain.*
References
Yokogoshi H, Kobayashi M, Mochizuki M, Terahima T. Neurochemical Res. 1998;23:667–73.
Juneja L, Chu D, Okubo T, Nagato Y, Yokogoshi H. Trends in Food Sci Tech. 1999;10:199–204.
Ito K, Nagato Y, Aoi N, et al. Nippon Nogeikagaku Kaishi 1998;72:153–7.
Kimura K, Ozeki M, Raj Juneja L, Ohira H. Biol Psych. 2007;74(1):39–45.
Yoto A, Motoki M, Murao S, Yokogoshi H. J Physiol Anthropol. 2012 Oct 29;31:28.
