L-Theanine CAS 3081-61-6

Theanine is a characteristic amino acid in tea leaves, synthesized by glutamic acid and ethylamine in the roots of tea plants under the action of theanine synthase. It is an important substance that forms the taste of tea leaves, mainly manifested as freshness and sweetness, and is the main component of tea that produces fluids, moistens, and sweetness. 26 types of amino acids (6 non protein amino acids) have been identified in tea, generally accounting for 1% to 5% of the dry weight of tea, while theanine accounts for more than 50% of the total free amino acids in tea.