Kava hepatotoxicity solution: A six-point plan for new kava standardization.

Area of Science:

• Ethnobotany
• Phytochemistry
• Pharmacology

Background:

• Kava (Piper methysticum) has a long history of traditional use, but recent cases of liver injury have raised safety concerns.
• These adverse events are linked to the use of substandard kava raw material, challenging its traditional reputation for safety.
• Existing kava legislation, particularly in Vanuatu, requires strengthening to address quality control issues.

Purpose of the Study:

• To propose a standardized approach for kava preparation to prevent hepatotoxicity.
• To ensure the quality and safety of kava for medicinal and traditional uses globally.
• To advocate for regulatory and commercial strategies for safe kava consumption.

Main Methods:

• Recommending the use of specific noble kava cultivars (e.g., Borogu) harvested at maturity (≥5 years).
• Specifying the use of peeled and dried rhizomes and roots for extraction.
• Advocating for water-based extraction methods and a maximum daily dosage of 250mg kavalactones for medicinal use.

Main Results:

• A six-point plan is proposed, emphasizing noble cultivars, specific plant parts, aqueous extraction, controlled dosage, rigorous research, and a Pan-Pacific quality control system.
• Standardization is crucial for international acceptance of kava as a safe anxiolytic herb.
• Current legislation is insufficient and requires enforcement and expansion.

Conclusions:

• Mandatory quality specifications are essential for the international acceptance of kava.
• A uniform approach to kava preparation, from cultivation to final product, is necessary for safe human use.
• Further clinical trials with aqueous kava extracts are needed to confirm efficacy and safety.