what is theanine
Theanine is an amino acid (a building block for proteins) found in green tea. People use theanine for treating anxiety and high blood pressure, for preventing Alzheimer âs disease, and for making cancer drugs more effective.heanine has been used one time per week for 3 weeks. It is not known if use for longer periods of time is safe. Pregnancy and breast-feeding: There is not enough reliable information about the safety of using theanine if you are pregnant or breast-feeding. Stay on the safe side and avoid use.