L-Theanine 200mg 60 vcaps by NOW FoodsDouble Strength Supports Cardiovascular Function Promotes Relaxation* L Theanine is an amino acid naturally found in green tea. L Theanine promotes relaxation without the drowsiness or negative side effects associated with other calming agents. L Theanine also supports healthy cardiovascular function through this relaxing effect. This formulation also includes Inositol, a member of the B Vitamin family that is essential for brain and nervous system