Jarrow Formulas' Theanine 100 is identical to the theanine found in green tea made enzymatically from amino acids.Ingredients:Rice powder and magnesium stearate. Capsule consists of gelatin.Suggested Use:Take 1 to 2 capsules per day with water or juice on an empty stomach, or as directed by your qualified health consultant.Product Facts:Serving Size (cap) 10Servings Per 60Theanine 100mg