Each vegetable capsule contains a 250mg daily dose of L-theanine Promotes a restful, relaxed state without diminishing alertness 90 day supply L-theanine is an amino acid found in green and black tea and commonly used as a natural stress reliever. In addition, it can help to improve concentration and focus without making you feel sleepy. As a psychoactive substance, L-Theanine can easily cross the blood-brain barrier, directly working its magic on the central nervous system. L-theanine is especially beneficial for anxiety sufferers because it increases dopamine and GABA (gamma-aminobutyric acid) receptors in the brain. GABA is a chemical receptor that reduces the activity of neurons that it binds to. In other words, it helps slow down the feelings of fear and stress when neurons become over excited. Ingredients L-Theanine 250mg Magnesium (magnesium bisglycinate) 20mg Non-Medicinal Ingredients Vegetable-grade magnesium stearate, vegetable capsule. Directions Take one (1) capsule per day or as directed by a healthcare practitioner.