L-Theanine is a natural compound found in tea and some mushrooms and has been studied for its ability to promote relaxation without drowsiness. It has been used in many types of traditional medicine, and it may also be useful for treating anxiety disorders and high blood pressure, as well as reducing stress.


L-Theanine is an amino acid that was first discovered in 1950 by a Japanese researcher who was looking for anti-stress compounds. Since then, it has been shown to promote relaxation and reduce blood pressure. It has also been found to have neuroprotective effects on the brain, possibly due to its ability to cross the blood brain barrier.


  • Improves cognition. It is thought that L-theanine may promote alpha brain waves, which are associated with relaxation and improved learning abilities.
  • Reduces anxiety and stress.
  • Improves blood pressure. Research suggests that taking L-theanine regularly could help lower your risk of stroke by reducing blood pressure levels over time, especially in people with high cholesterol or who are overweight or obese. This may be caused by how it affects nitric oxide, a substance produced by the body that helps arteries relax and dilate properly; studies have shown that L-theanine can help reduce nitric oxide levels in people with high blood pressure (hypertension).


L-theanine is generally considered safe for most people, though some may experience side effects such as nausea, headache and irritability at high doses.


L-Theanine is an amino acid that is found in tea and mushrooms. It has a number of benefits that have been shown to improve mental health and overall well-being. These include promoting relaxation, relieving stress and anxiety, and improving focus and concentration.

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