Natural Factors Suntheanine L-Theanine for Calm*, 100 mg, 120 Chewable Tabs

Customers find the supplement effective for mild anxiety, with one noting it doesn't cause drowsiness, and they appreciate its fruit-flavored chewable tablets that help with concentration and mental clarity. The product receives positive feedback for its natural ingredients and convenience as a chewable supplement. While some customers report it lasts for months, others mention it only lasts about 5 hours, and some experience nausea as a side effect.