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Unsolved Mystery of Kava Toxicity

by Sheela Philomena on  July 15, 2011 at 10:40 AM Alternative Medicine News   - G J E 4
A recently conducted fails to solve the mystery of why kava consumption is toxic to some people and non-toxic to others. Kava is a plant used to make dietary supplement and a trendy drink with calming effects.
 Unsolved Mystery of Kava Toxicity
Unsolved Mystery of Kava Toxicity
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Line Olsen and colleagues point out that for centuries, people of the Pacific Islands have safely consumed a beverage made from crushed kava roots.

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Kava's calming effects made it popular in Western cultures in the 1990s, when people also began to use an herbal supplement for the treatment of anxiety, emotional stress and sleep problems.

But in 2001, reports of liver damage among Westerners who took kava supplements gained widespread attention.

Many Western countries, including the United States, the United Kingdom, and Canada, ban or regulate the sale of kava products.

To determine why kava is toxic to some people but not to others, the researchers sifted through the scientific studies published on the topic.

Their review of 85 scientific studies on kava toxicity found no consensus on kava toxicity, despite several theories that have emerged over the years.

Culprits include methods for preparing kava, the particular species of kava used, the possible toxicity of substances produced by the body when kava is digested and genetic differences among consumers.

"To date, there remains no indisputable reason for the increased prevalence of kava-induced hepatotoxicity in Western countries," the researchers said.

The article appears in ACS' journal Chemical Research in Toxicology.

Source: ANI
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