L-Theanine (L Theanine)(LTheanine)( 5-N-Ethyl-Glutamine) is an amino acid that is not commonly obtained through diet. – Third Party Tested and Manufactured in the USA from Globally Sourced Ingredients: Doublewood L Theanine capsules are third party tested and Manufactured in the USA from Globally Sourced Ingredients – L-Theanine is perfect for those that need to remain calm while retaining a sharp mental edge – Non-GMO and Gluten Free: Double Woods L-Theanine is Non-GMO and Gluten Free – Works Well with Magtein (Magnesium L-Threonate) and Apigenin: Take with Magnesium L-Threonate and Apigenin for best results