L-Theanine is a unique free amino acid in tea, and L-theanine is γ-ethylamide of glutamic acid, which is sweet. Theanine accounts for 1%-2% of the dry tea. Theanine is similar to glutamine and glutamic acid in chemical structure, and it is the main component of tea.

Molecular formula: C7H 14N2O3.

Appearance: white or white-like powder.

Melting point: 202-2 15℃

PH value: 5.0-6.5