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Head-to-head evidence comparison — which supplement is right for you?
Passionflower wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
4 of 4 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 Passionflower and Skullcap have evidence — compare verdict strength side-by-side.
250-500mg extract (or 2g dried herb)
For anxiety: as needed, For sleep: 30-60 minutes before bed
Standardized extract capsules
350-450mg dried herb OR 1-2ml tincture (1:5), up to 3x daily
Before bed for sleep, During day for anxiety as needed
Fresh plant tincture (most traditional)
30 min - 2 hours
30-60 minutes
30-60 minutes
30-60 minutes
30-60 minutes before bed
Herbal Remedies and Their Possible Effect on the GABAergic System and Sleep
Nutrients (2021) · Systematic review
Gamma-aminobutyric acid (GABA) is an inhibitory neurotransmitter that plays a major role in controlling different vigilance states.
Passiflora incarnata in Neuropsychiatric Disorders-A Systematic Review
Nutrients (2020) · Systematic review
Passiflora incarnata may be helpful in treating some symptoms in neuropsychiatric patients.
Herbal medicine for depression and anxiety: A systematic review with assessment of potential psycho-oncologic relevance
Phytotherapy research : PTR (2018) · Systematic review
Overall, 45% of studies reported positive findings with fewer adverse effects compared with conventional medications.
Baicalin and baicalein against myocardial ischemia-reperfusion injury: A review of the current documents
Tissue & cell (2025) · Systematic review
Research in both animal and cell models suggests that these flavonoids, especially baicalin, can restore cardiac health following MIRI, improving cardiac performance, and reducing cardiac damage.
Promising Role of the Scutellaria baicalensis Root Hydroxyflavone-Baicalein in the Prevention and Treatment of Human Diseases
International journal of molecular sciences (2023) · Systematic review
It has been documented that the extract of Baikal skullcap (Scutellaria baicalensis) has hepatoprotective, calming, antiallergic, and anti-inflammatory properties.
Wogonin and its analogs for the prevention and treatment of cancer: A systematic review
Phytotherapy research : PTR (2022) · Systematic review
WOG, in combination with established chemotherapeutic drugs, improves the efficacy of treatment and lowers toxicity.
Based on meta-analysis of 198 subjects noting insufficient RCT data for definitive conclusions. Effectiveness limited by small sample sizes and study quality limitations. Drowsiness is primary dose-limiting side effect.
Based on single crossover RCT (n=43) showing significant group effect for mood in healthy volunteers. Study population was relatively non-anxious (81% mildly anxious or less). Carryover effects noted. Limited evidence base requires further validation in clinical populations.
AI-estimated from published studies. Interpret as directional guidance.
Passionflower has a higher evidence score (5.5/10 vs 4/10) and wins in 3 of 3 categories.
For reduce anxiety & stress, Passionflower has a higher relevance score (85 vs 75).
No known interactions between Passionflower and Skullcap have been documented in our database. However, always consult a healthcare provider before combining supplements.