Kava
Piper methysticum (Kava)
Kava (Piper methysticum) is a Pacific Island plant whose root extract has been used for centuries as a ceremonial and social beverage with anxiolytic and mild sedative properties. It is primarily used for the management of anxiety, stress, and insomnia, and has been studied as an alternative to benzodiazepines for generalized anxiety disorder. The active compounds, kavalactones, are responsible for its psychoactive and therapeutic effects.
Mechanism of Action
Kavalactones (particularly kavain, dihydrokavain, methysticin, and dihydromethysticin) modulate GABA-A receptor activity, enhancing inhibitory neurotransmission similarly to benzodiazepines but via distinct binding sites. They also inhibit voltage-gated sodium and calcium channels, reduce norepinephrine reuptake, and exhibit reversible inhibition of monoamine oxidase B, collectively producing anxiolytic, sedative, and mild analgesic effects. Kavalactones additionally interact with dopamine and serotonin systems, which may contribute to mood-elevating properties.
Evidence by Health Goal(15 goals)
Dosing Protocols
Evening or 30-60 minutes before a stressful event; avoid taking with food high in fat for faster onset, or take with a small fatty meal to enhance absorption
Cycle: 4-8 weeks on, 2-4 weeks off
Standardized extracts should specify kavalactone content (typically 30-70% kavalactone extracts). Noble kava varieties (e.g., Borogu, Mahakea) are strongly preferred over tudei or non-noble cultivars for safety. Do not exceed 400mg kavalactones per day. Traditional aqueous preparations may have a different safety profile than acetonic or ethanolic extracts.
Safety & Side Effects
Kava has a generally favorable safety profile when noble cultivar aqueous or standardized extracts are used at recommended doses for short periods; however, rare cases of serious hepatotoxicity have been reported, primarily linked to non-noble varieties, poor-quality extracts, or co-ingestion of alcohol. Kava is regulated or banned in several countries (including some periods of restriction in Germany, Canada, and the UK), and individuals with pre-existing liver conditions or heavy alcohol use should avoid it entirely.
Possible Side Effects
- !Sedation and drowsiness, especially at higher doses
- !Gastrointestinal discomfort including nausea and stomach upset
- !Dermopathy (kava dermopathy) - dry, scaly, yellowed skin with chronic heavy use
- !Transient mild headache or dizziness
- !Reduced motor coordination and reaction time at high doses
- !Liver toxicity (hepatotoxicity) - rare but serious, associated primarily with non-noble varieties or solvent-based extracts
- !Tolerance and dependence with prolonged daily use
Interactions
- -Significantly potentiates CNS depressants including alcohol, benzodiazepines, and sedative medications - concurrent use increases risk of sedation and liver toxicity
- -May enhance effects of other anxiolytic or sedative supplements such as valerian, passionflower, or L-theanine
- -Inhibits CYP1A2, CYP2C9, CYP2C19, CYP2D6, and CYP3A4 liver enzymes - can increase plasma levels of many medications metabolized by these pathways
- -Additive hepatotoxicity risk with acetaminophen, statins, or other hepatotoxic drugs or supplements
- -May potentiate antiplatelet and anticoagulant effects - use caution with aspirin, warfarin, or NSAIDs
Cost & Where to Buy
Cost varies significantly by kavalactone concentration, cultivar quality (noble vs. non-noble), and extract type. Reputable standardized capsule products with verified noble kava sourcing run higher. Traditional dried root or instant kava powders are typically more affordable but require preparation.
Search on Amazon