Kava kava, also referred to simply as kava, is an herbal remedy made from dried roots of the shrub Piper methysticum. It can be used as a tea (2 to 4g of kava kava per cup for adults), or taken in capsule form (dosages vary). It is particularly useful for treating anxiety disorder, but the U.S. National Institutes of Health (NIH) recommends using this herb only under the supervision of a reputable health care practitioner. Severe side effects are possible, including liver damage.
Anti-Anxiety
Research has confirmed the effectiveness of kava kava in treating anxiety, according to the NIH. People have found relief within a week and showed progressive improvement over the next few weeks. Kava kava may be as effective as azaspirodecanediones such as buspirone (Buspar) and benzodiazepines such as diazepam (Valium) and alprazolam (Xanax). One study showed that kava kava and diazepam result in similar changes in brain waves, according to the University of Maryland Medical Center (UMMC).
Cognitive Performance
Kava kava may enhance mood and cognitive performance, according to one study cited by the UMMC. This effect contrasts with prescription medications that treat anxiety, as those tend to reduce cognitive function.
Relieving Insomnia
Kava kava causes sedation or drowsiness in some people, so theoretically it should be able to relieve sleep problems, improve sleep quality and reduce the time it takes to fall asleep, as noted by the UMMC. Some people take kava kava to help with jet lag. Several studies, however, indicate that kava kava may not have a significant impact on insomnia.
Stress Reduction
Research indicates that kava kava, when combined with valerian root, may decrease the body's reactions in stressful situations, and may relieve insomnia caused by stress. The NIH explains that more studies are necessary to confirm this effect.
Diuretic Properties
Kava kava has diuretic properties, according to the NIH. It increases urine output and may be useful in relieving edema, or fluid retention, which typically occurs in the legs, ankles and feet.
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