L-Theanine

Theanine is a special free amino acid in tea. It can significantly promote the release of dopamine in brain center and improve the physiological activity of dopamine in brain. Dopamine is a kind of central neurotransmitter that activates brain nerve cells. Its physiological activity is closely related to human emotional state. Although the mechanism of Theanine in the brain central nervous system is not very clear. But theanine's effect on spirit and emotion is no doubt partly due to its effect on the physiological activity of central neurotransmitter dopamine. Of course, the anti fatigue effect of drinking tea is also thought to come from this effect to a certain extent.

1.L-theanine can reduce blood pressure. It is generally believed that the regulation of blood pressure is affected by the secretion of catecholamine and 5-hydroxytryptamine. Studies have shown that theanine can effectively reduce spontaneous hypertension in rats. Kimura et al. Suggested that the antihypertensive effect of theanine may come from the regulation of 5-hydroxytryptamine secretion in the brain. Theanine can also be regarded as a kind of stabilizing effect to some extent. And this kind of stabilizing effect will undoubtedly contribute to the recovery of physical and mental fatigue.

2.L-Theanine can inhibit the death of nerve cells caused by transient cerebral ischemia and have protective effect on nerve cells. The death of nerve cells is closely related to glutamate, the excitatory neurotransmitter. Cell death occurs when glutamate is too much, which is usually the cause of Alzheimer's disease. Theanine and glutamate structure are similar, and it can compete for the binding site, thus inhibiting the death of nerve cells. Theanine may be used for the treatment and prevention of brain disorders caused by glutamate, such as cerebral embolism, cerebral hemorrhage, and other diseases such as virtual blood and dementia during brain operation or brain injury.