Theanine (L-Theanine) is a unique free amino acid in tea. Theanine has a sweet taste, and it is the main ingredient in tea that produces body fluids and moisturizes sweetness. At present, theanine has been used to treat common mental illness and depression .Theanine can effectively improve ADHD in children; it has obvious therapeutic effect on menopausal syndrome. There are no restrictions on the intake of theanine, which is highly safe.
Physiological effects of theanine:
(1) Theanine can affect the changes of neurotransmitter substances in the brain and enhance memory
(2) Theanine has a sedative effect, which may prevent nervous disorders, insomnia, menstrual syndrome, etc.
(3 ) Theanine can protect nerve cells and may be used to prevent and treat diseases such as cerebral embolism, cerebral hemorrhage, cerebral apoplexy, cerebral ischemia and senile dementia.

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