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Head-to-head evidence comparison — which supplement is right for you?
Kava wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Probably helps
4 of 7 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mostly mechanism / observational
2 of 2 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Kava and Magnolia Bark have evidence — compare verdict strength side-by-side.
150-300mg kavalactones daily
Evening for relaxation, 30-60 minutes before stressful events, Before bed for sleep
Water-extracted root powder or capsules
200-400mg (standardized to 2% honokiol and magnolol)
Evening for sleep, As needed for anxiety
Standardized extract (honokiol/magnolol content specified)
30-60 minutes
30-60 minutes
30-60 minutes
1-2 hours
30-60 minutes
30-60 minutes
1-2 weeks
Herbal medicines in the treatment of psychiatric disorders: 10-year updated review
Phytotherapy research : PTR (2018) · Systematic review
Other encouraging herbal medicines with preliminary evidence include Curcuma longa (turmeric) in depression, Withania somnifera (ashwagandha) in affective disorders, and Ginkgo biloba (ginkgo) as an adjunctive treatment in Schizophrenia.
GABA-modulating phytomedicines for anxiety: A systematic review of preclinical and clinical evidence
Phytotherapy research : PTR (2018) · Systematic review
An open-ended search to 5 July 2017 was conducted using MEDLINE (PubMed), Scopus, and Cochrane library online databases and performed in a stepped format from preclinical to clinical investigations.
Herbal medicine for insomnia: A systematic review and meta-analysis
Sleep medicine reviews (2015) · Meta analysis · n=1602
There was no statistically significant difference between any herbal medicine and placebo, or any herbal medicine and active control, for any of the thirteen measures of clinical efficacy.
The Cardioprotective Effect of Magnolia officinalis and Its Major Bioactive Chemical Constituents
International journal of molecular sciences (2025) · Systematic review
In addition, there is no clinical evidence for the absorption and bioavailability of M. officinalis extracts and their main bioactive compounds in humans.
Depression and Its Phytopharmacotherapy-A Narrative Review
International journal of molecular sciences (2023) · Systematic review
Moreover, it is noteworthy that the anti-inflammatory effect is also important to the antidepressant activity of the plants mentioned above in light of the hypothesis that immunological disorders of the CNS are a significant pathogenetic factor of depression.
Effectiveness of Magnolol, a Lignan from Magnolia Bark, in Diabetes, Its Complications and Comorbidities-A Review
International journal of molecular sciences (2021) · Systematic review
Magnolol, a polyphenolic compound found in magnolia bark, is known for its health-promoting activities and multidirectional beneficial effects on the body.
Based on multiple meta-analyses showing efficacy vs placebo with effect size comparable to benzodiazepines for mild-moderate anxiety. WS1490 extract showed OR=3.3 vs placebo. Effectiveness limited to 60% due to mixed results in some GAD populations and study quality limitations.
Based on single RCT (n=40) showing cortisol reduction and mood improvement with magnolia extract. Limited human data on bioavailability. Effectiveness conservative due to small study size and lack of replication. Drowsiness may occur at higher doses.
AI-estimated from published studies. Interpret as directional guidance.
Kava has a higher evidence score (9/10 vs 7.5/10) and wins in 2 of 3 categories.
For reduce anxiety & stress, Kava has a higher relevance score (90 vs 80).
No known interactions between Kava and Magnolia Bark have been documented in our database. However, always consult a healthcare provider before combining supplements.