Another tea that is highly beneficial to anxiety prone sufferers is green tea. A special amino acid found in high quantities in green is known as L-theanine. L-theanine has been shown to curb rising heart rates and blood pressures, two of the major symptoms of anxiety itself. By battling these major symptoms it helps patients from experiencing tough stressful symptoms and helps them calm while still staying alert unlike chamomile. To get the recommended dosage of L-theanine for high stress, however, supplements are recommended as the quantities in green tea vary significantly from needing as few as 5 cups up to nearly 20 at a time.