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Types of Kava: Forms & Bioavailability

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Forms Comparison

FormBioavailabilityBest For
Standardized Kava Extract (30% kavalactones)Moderate-HighAnxiety — standardized dosing used in most clinical trials; ensure noble cultivar sourcing
WS 1490 (Standardized Extract)Moderate-HighClinically validated — the specific extract used in many European clinical trials including the Cochrane-reviewed studies
Traditional Kava Root Preparation (Water Extract)ModerateTraditional use — aqueous root preparation as consumed in Pacific Island cultures for thousands of years; safest preparation method
Noble Kava Root PowderLow-ModerateTraditional preparation — premium cultivar powder for preparing kava beverages; requires straining

Standardized Kava Extract (30% kavalactones)

Bioavailability: Moderate-High. Best for: Anxiety — standardized dosing used in most clinical trials; ensure noble cultivar sourcing.

WS 1490 (Standardized Extract)

Bioavailability: Moderate-High. Best for: Clinically validated — the specific extract used in many European clinical trials including the Cochrane-reviewed studies.

Traditional Kava Root Preparation (Water Extract)

Bioavailability: Moderate. Best for: Traditional use — aqueous root preparation as consumed in Pacific Island cultures for thousands of years; safest preparation method.

Noble Kava Root Powder

Bioavailability: Low-Moderate. Best for: Traditional preparation — premium cultivar powder for preparing kava beverages; requires straining.

Full Kava Guide

References

  1. (). Kava extract for treating anxiety. Cochrane Database of Systematic Reviews. DOI
  2. (). Kava in the treatment of generalized anxiety disorder: a double-blind, randomized, placebo-controlled study. Journal of Clinical Psychopharmacology. DOI
  3. (). Kava hepatotoxicity solution: a six-point plan for new kava standardization. Phytomedicine. DOI
  4. (). Kava: a comprehensive review of efficacy, safety, and psychopharmacology. Australian and New Zealand Journal of Psychiatry. DOI