88 HERBS - L -Theanine - 60 Veggie Capsule(s) - NPN: 80050919 -- LTheanine is used for many things, but its best known for its stress and anxiety reducing properties. LTheanine reduces blood pressure and other physiological stress signals during stressful situations.Many anxiolytic (anti-anxiety) medications cause extreme drowsiness as a major side effect. LTheanine, however, is unique in that its able to reduce anxiety without causing drowsiness.It does this by increasing alpha brain wave activity, which is high during peak states of deep meditation and during REM sleep. The increased alpha brain wave activity provides a calm sense of relaxed wakefulness.