One of Germany's highest courts has ruled that Germany's ban on products containing kava is unlawful and inappropriate.
The decision by Germany's Federal Administrative Court overturns a ban brought in 2002 because of public health authorities' fears over kava's toxicity.
The court found the risk of using kava was not unusually high and mere doubts over a medicinal product did not justify it being banned.
A Vanuatu-based researcher who provided scientific evidence at the trial, Vincent Lebot, says the victory comes after a hard-fought battle lasting 12 years which has had an impact on exports to the EU and the US.
"It's a clear victory for all of us who know that when kava is properly used with the right varieties cultivated with the right agricultural practices in a reasonable way, we know that it's not a dangerous product."
Dr Lebot says the region's kava trade is still under threat as there are serious problems with the quality of kava being exported from the region.