Principal Proposed Uses
- Stress ; Mental Function
Optimal doses of tea or its constituents are not known.
What Is the Scientific Evidence for L-Theanine?
There have not been any side effects reported from taking L-theanine. However, drinking large amounts of green tea in general may cause upset stomach, irritability, and nausea due to the tea’s caffeine content. Also, do not take L-theanine if undergoing chemotherapy or are taking lipid-lowering medicines or sedatives, since L-theanine may alter the effects of these drugs.
- Reviewer: EBSCO CAM Review Board
- Review Date: 08/2013 -
- Update Date: 11/18/2014 -