Theanine is the main component of free amino acids in tea leaves, and the content of theanine in fresh tea leaves accounts for about 1-2% of the dry weight of tea leaves.
The benefits of theanine are mainly concentrated in two aspects of medicine and food. In recent years, the application of theanine to treat depression and improve sleep has become a hot topic of research in recent years, and the application of theanine and its derivatives to adjuvant doxorubicin in the treatment of tumors also has potential research value.

The role of theanine in the field of medicine:
1. As an antitumor drug
Animal experiments have shown that theanine has a delaying effect on metastatic tumors in mice, and can prolong the survival period of mice with leukemia.
2. For antihypertensive drugs
Animal experiments show that the systolic blood pressure and diastolic blood pressure of rats are significantly decreased by feeding high doses of theanine.
3. Sedative drugs
Theanine has been used as an active ingredient in sedatives and has a preventive effect on Parkinson's disease, senile dementia, conduction nerve dysfunction, and other diseases.