Kava

Kava supplement forms studied in human research

The clearest current human evidence suggests a likely benefit for Anxiety Symptoms Generalized Anxiety Disorder. Claims should stay limited to the graded outcomes shown below.

What the research says

Each row is a different health effect. A means the support looks strongest, B likely helpful, C mixed or modest, and — not enough human evidence yet.

B · Likely helpful

Anxiety Symptoms Generalized Anxiety Disorder

The research suggests this may help with anxiety Symptoms Generalized Anxiety Disorder in the studied settings. Broader claims would go beyond the evidence shown here.

19 papers · 7 research reviews

Safety

Safety is graded separately from benefits. Read these cautions first, especially if you take medication or have a medical condition.

✓ Safe No clear harm signal in the human evidence reviewed.

✓

Medication and condition cautions

This is a safety note, not a benefit claim. It should not be read as a green light for every person or situation.

11 direct human study

⚠ Concerning The human evidence points to a meaningful reason for caution.

⚠

Liver-safety concerns

This is a safety note, not a benefit claim. It points to a real reason for caution.

7 direct human studies

⚠

Side effects and tolerability

This is a safety note, not a benefit claim. It points to a real reason for caution.

8 direct human studies

Quick facts

A quick read on what this page supports right now.

Health effects reviewed

1 health effect reviewed

Best grade shown

B · Likely helpful

Benefits with support

1 use currently shows some level of supportive evidence

Safety rows

3 separate safety or caution rows

Research volume

19 unique research papers across graded uses on this page

What this means

Keep any benefit claims limited to the specific graded uses shown here.

Quality-verified products

Products that pass third-party quality testing.

Product quality data coming soon

Any future product listings should stay aligned with the specific graded outcomes and the separate safety rows shown here.

How we graded Kava

This page shows the current public rows for Kava: 19 unique research papers across 1 visible health effect. Safety rows are shown separately from benefit rows when available. The page includes 7 review-level papers and 12 direct human studies. Each supplement is graded by health effect using a certainty × effect matrix applied across PubMed evidence per health effect. Cochrane reviews and high-quality systematic reviews carry the most weight. See Methodology for full detail.

Read the full methodology → · Citation PDF coming soon