Kava — Frequently Asked Questions

The liver safety concern is important but nuanced. Rare cases of severe liver injury were reported primarily in Europe in the early 2000s, leading to temporary bans. Subsequent investigation (Teschke 2012) found most cases involved non-noble kava cultivars, aerial plant parts (not root), or improper extraction methods. Noble cultivar root, prepared traditionally with water, has been consumed safely by Pacific Island populations for over 3,000 years. To minimize risk: use only noble cultivar root extracts, avoid combining with alcohol, limit continuous use to 3 months, and avoid if you have existing liver disease.

Noble kava cultivars are traditional varieties selected by Pacific Island cultures over centuries for their desirable psychoactive and safety profiles. They have a favorable kavalactone chemotype (high in kavain and dihydrokavain) and low levels of potentially hepatotoxic compounds like flavokavains. Non-noble or "tudei" (two-day) cultivars have different chemotypes and are associated with most adverse effect reports. When purchasing kava, look for products specifying noble cultivar sourcing — reputable brands will identify the cultivar (e.g., Borogu, Melo Melo, Pouni Ono).