Effects of chronicl-theanine administration in patients with major depressive disorder: an open-label study

Objective l -theanine, an amino acid uniquely contained in green tea ( Camellia sinensis ), has been suggested to have various psychotropic effects. This study aimed to examine whether l -theanine is effective for patients with major depressive disorder (MDD) in an open-label clinical trial. Methods Subjects were 20 patients with MDD (four males; mean age: 41.0±14.1 years, 16 females; 42.9±12.0 years). l -theanine (250 mg/day) was added to the...