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 health.* This product has twice the L-theanine (200 mg per capsules) as in our regular strength product (100 mg per capsule). Other Ingredients are Hypromellose (cellulose capsule), Stearic Acid (vegetable source) and Silicon Dioxide