Is kava safe for anxiety?
Kava has real Cochrane-reviewed anxiety efficacy, but also a genuine, FDA-flagged liver toxicity risk -- this is the item in this cluster that most warrants a doctor conversation before trying.
The short answer
A Cochrane review and meta-analysis of 7 randomized controlled trials using kava mono-preparations found a statistically significant reduction in anxiety on the Hamilton Anxiety Rating Scale compared to placebo -- genuinely strong anxiolytic efficacy for a traditional remedy. But reports of serious liver damage, including in short-term use, led the FDA to issue formal warnings about kava-containing supplements; those initial reports have been questioned and the picture remains actively debated. Kava has been a traditional ceremonial and social beverage across Pacific Island cultures for centuries, prepared from pounded root mixed with water. Given the severity of the specific liver-toxicity concern, it should not be combined with alcohol or other substances metabolized by the liver, should not be used for extended periods without medical monitoring, and is not recommended during pregnancy or breastfeeding. This is the clearest case in this cluster for discussing use with a doctor first.