Theanine is a unique amino acid that is found almost exclusively in the tea plant (Camellia sinensis) which has been used safely in Japan for decades. It supports a healthy balance of brain neurotransmitters involved in stress management. Each capsule provides 200 mg of L-Theanine.Thorne's logo, text, trademarks, graphics, videos and photo images are the property of Thorne and are used with permission. Copyright © 2023*FDA Disclaimer: The information about this product and statements made are provided by the manufacturer, except customer reviews which are not evaluated. See www.thorne.com for information about the relationship between this product and any claims made. Results may vary from person to person based on body size and other factors, and the effectiveness is not guaranteed for you. Always seek the advice of your healthcare professional about taking dietary, nutritional, herbal or homeopathic supplements.