Allergy Research Group ARG 200 mg of Zen – Supports Calm and Stress Balance – Delivers 200 mg L-Theanine & 550 mg GABA per Serving – Vegetarian & Hypoallergenic – 60 Servings – 120 Capsules

Customers find the supplement effective for anxiety relief, particularly noting it helps with poor sleep, and one customer mentions it works well for children. The product improves sleep quality without causing groggy or drowsy feelings, and customers appreciate its good price. While most customers report no side effects, some mention experiencing headaches.