Kava root
Kava root from the South Pacific enjoys several human clinical studies demonstrating efficacy in treating mild to moderate anxiety. In human studies, kava has performed as well as the benzodiazepine class of drugs (Valium, Xanax), but without negative effects. Kava has attracted the attention of senior researchers at the National Institutes of mental health as a result.
In 2001, Duke University Medical Center doctors conducted two studies on kava extract. One study showed that kava is safe for the liver, causing no noticeable problems.