Learn More About L-Theanine

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l-theanine

What is l-theanine?

L-theanine, or theanine, is an amino acid found in tea. Theanine is an interesting amino acid in that it can cross the blood-brain barrier. Theanine has some psychoactive properties. L-Theanine can reduce stress, both mental and physical, induce relaxation, heighten cognitive function, and enhance mood.

What does l-theanine do?

It is thought that theanine's affects on the brain are a direct result of the increased production of GABA (gamma-aminobutyric acid), serotonin, and dopamine. Theanine relaxes the nerves and has been shown to improve memory retention and learning. This remarkable amino acid has been shown to stimulate alpha waves in the brain, and alpha brain waves promote a relaxed and alert feeling.

A study performed by the University of Shizuoka showed some positive correlation between theanine intake and learning. In the study, 8 rats were given roughly 400mgs of theanine per day for 3 weeks. Another group of 8 rats, the control group, were given none. The test involved object recognition and memory retention. Several tests were conducted and the 8 rats given theanine showed improved learning ability and memory retention.

Theanine has been showing positive benefits in a variety of areas. One study conducted on rats with high blood pressure concluded that the addition of theanine lowered blood pressure. It reduces the blood pressure by relaxing the nerves and reducing the level of norephinepherine. The same study conducted on rats with regular blood pressure showed no lowering affects.

This impressive amino acid has also shown benefits in the treatment of cancer. Studies performed in Japan are showing a high correlation between chemotherapy coupled with theanine and more successful chemotheraphy treatments. Theanine is thought to enhance the killing power of chemotherapy. One way in which it may be helping is by increasing the amount of chemo drugs entering cancer cells. Interestingly enough, normal cells do not experience the increase in chemo drugs. Theanine is thought to inhibit the ability of cancer cells to fight off the toxic affect of chemotherapy.

Who should take l-theanine?

Theanine's positive effects make it desirable for many people. It is recommended for anyone that is interested in relaxing, improving learning abilities, reducing stress related high blood pressure, improving mood.
How much l-theanine is usually taken and what are the side effects?
The recommended dose is around 100mg and the affects can last for up to 8 hours. A sense of light headedness has been reported with high doses (1,000 mgs or more per day).

References:

http://www.grouppekurosawa.com/blog/2005/01/l-theanine-and-cancer-control.htm
http://www.annieappleseedproject.org/theanenchemu.html
http://en.wikipedia.org/wiki/Theanine
http://www.jstage.jst.go.jp/article/bbb/72/5/1356/_pdf

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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