📌 Quick Reference
- Best for anxiety + sleep combined: Passionflower — mild-moderate sedation, dual-purpose, short-term daily use generally fine.
- Strongest sedative: Valerian root and Kava — both moderate-to-strong, best for occasional rather than nightly use.
- Best for stress without drowsiness: Ashwagandha, Rhodiola, L-theanine — low sedation, daytime-safe.
- Best for sleep-onset timing (jet lag, shift work): Melatonin — targets circadian rhythm, not general anxiety.
- Caution list (avoid combining with sedatives/alcohol/pregnancy without medical advice): Valerian, Kava, Passionflower, CBD, Skullcap.
- Most consistent human clinical evidence: Melatonin (sleep onset), Ashwagandha (cortisol/stress), Valerian (sleep quality).
Data compiled from/expanded on this guide: Purple Passion Plant Benefits: Health, Care & Uses
| Supplement | Primary Use | Mechanism | Sedation Level | Typical Adult Dose | Onset Time | Daily Use Safety | Liver/Organ Concern | Key Interactions | Pregnancy Safe? |
|---|---|---|---|---|---|---|---|---|---|
| Passionflower (Passiflora incarnata) | Anxiety + Sleep | GABA modulation | Mild–Moderate | 300–400mg extract or 1–2 cups tea, 30–60 min pre-bed | 30–60 min | Short-term OK (~8 wks studied) | Rare, isolated case reports | Sedatives, SSRIs/MAOIs, blood thinners | ❌ Avoid |
| Valerian Root | Sleep | GABA modulation | Moderate–Strong | 300–600mg, 30–60 min pre-bed | 30–60 min | Short-term OK | Rare | Sedatives, alcohol, benzodiazepines | ❌ Avoid |
| Ashwagandha | Stress + Energy | Cortisol regulation | Low | 300–600mg daily (standardized root extract) | 2–4 weeks (cumulative) | Generally OK | Rare, monitor with thyroid meds | Thyroid meds, immunosuppressants, sedatives | ❌ Avoid |
| Melatonin | Sleep Onset | Circadian rhythm support | Moderate | 0.5–5mg, 30–60 min pre-bed | 30–60 min | Occasional best; nightly use debated | None noted | Blood thinners, immunosuppressants, sedatives | ⚠️ Consult |
| Kava | Anxiety | GABA modulation | Moderate–Strong | 70–250mg kavalactones daily | 30–90 min | Short-term only | ⚠️ Documented hepatotoxicity risk | Alcohol, sedatives, Parkinson's meds | ❌ Avoid |
| L-theanine | Calm focus, mild anxiety | Alpha brain wave promotion | Very Low | 100–400mg daily | 30–60 min | Generally OK long-term | None noted | Stimulant medications, blood pressure meds | ⚠️ Consult |
| Chamomile | Mild sleep + digestive calm | GABA-adjacent, mild sedative | Mild | 1–2 cups tea or 400–1600mg extract | 30–45 min | Generally OK | None noted | Blood thinners, sedatives | ⚠️ Consult |
| Lemon Balm | Mild anxiety, sleep | GABA-transaminase inhibition | Mild | 300–600mg daily | 30–60 min | Generally OK | None noted | Thyroid meds, sedatives | ⚠️ Consult |
| Hops | Sleep (often combined) | GABA modulation | Mild–Moderate | 300–500mg (often with valerian) | 30–60 min | Short-term OK | None noted | Sedatives, alcohol | ❌ Avoid |
| Magnesium Glycinate | Sleep + muscle relaxation | NMDA/GABA receptor support | Low–Mild | 200–400mg pre-bed | 30–60 min | Generally OK long-term | Caution with kidney disease | Certain antibiotics, diuretics | ⚠️ Consult |
| CBD (Cannabidiol) | Anxiety + Sleep | Endocannabinoid system | Mild–Moderate (dose-dependent) | 15–50mg daily (varies widely) | 30–90 min | Emerging long-term data | ⚠️ Monitor with liver conditions | Many meds via CYP450 pathway | ❌ Avoid |
| Rhodiola Rosea | Stress adaptation, fatigue | Adaptogen, cortisol modulation | Low (energizing) | 200–600mg daily | Days–weeks | Generally OK | None noted | Antidepressants, diabetes meds | ⚠️ Consult |
| Skullcap | Nervous tension | GABA modulation | Mild–Moderate | 1–2g dried herb or tincture equiv. | 30–60 min | Limited long-term data | ⚠️ Rare case reports | Sedatives | ❌ Avoid |
| Glycine | Sleep quality | NMDA receptor / thermoregulation | Low | 3g pre-bed | 30–60 min | Generally OK | None noted | Minimal known | ⚠️ Consult |
| 5-HTP | Mood + sleep | Serotonin precursor | Mild–Moderate | 50–100mg pre-bed | 30–90 min | Short-term generally OK | None noted | SSRIs/MAOIs — serious interaction risk | ❌ Avoid |
| GABA (supplement form) | Relaxation | Direct GABA supplementation | Mild–Moderate | 100–200mg | 30–60 min | Limited long-term data | None noted | Sedatives, blood pressure meds | ❌ Avoid |
| Lavender (oral capsule) | Anxiety | Multiple CNS pathways | Mild | 80mg standardized (e.g., Silexan) daily | 2 weeks (cumulative) | Studied up to 10 wks | None noted | Sedatives | ⚠️ Consult |