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Valeriana officinalis
GABA receptor agonist that improves sleep quality with 2-4 weeks of consistent use — best as part of a nightly routine.
What the evidence says
Most Valerian Root studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from high-quality meta-analyses and randomised trials published 1982–2025 with a typical study size of 128 participants.
Based on 14 studies · 3 meta-analyses · 7 RCTs · 9,528 total participants
Confidence
HighWhat the studies found
By outcome
Valerian Root has an evidence score of 7/10 — strong evidence based on 14 indexed studies, including 2 meta-analyses. GABA receptor agonist that improves sleep quality with 2-4 weeks of consistent use — best as part of a nightly routine.
The commonly studied dose of Valerian Root is 300-600mg extract. Research points to an estimated optimal dose around 600mg, with a minimum effective dose near 300mg. Individual response varies — start low and adjust.
The best time to take Valerian Root is before bed. Taking it with food is preferred. Valerian (Valeriana officinalis) contains valerenic acid, which inhibits GABA transaminase (the enzyme that breaks down GABA), and isovaleric acid, which acts on GABA-A receptors.
Last reviewed May 2026 · evidence from 18 studies · how we score
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
Valerian root has been used for centuries to promote sleep and reduce anxiety. It contains compounds that interact with GABA receptors. Effects are typically subtle and may take 2-4 weeks of consistent use to become noticeable. Works best as part of a sleep routine rather than acute use.
Enhances GABA signaling for calming effects
May promote sleepiness through adenosine
How Valerian Root works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
300-600mg extract
Can be taken without food
| Form | Type |
|---|---|
| 💊Standardized extract capsules | Recommended |
| 🍵Tea | Alternative |
| 💧Tincture | Alternative |
| 🧪Root powder | Alternative |
Extracts standardized to valerenic acid content are more reliable. Tea is traditional but less potent.
Minimum: 2 weeks
Optimal: 4 weeks
Cycling: Use for 4-6 weeks, then take a 1-week break. Long-term safety data is limited.
Note: Take consistently at the same time each night. May take 2-4 weeks to see full benefits. Can be taken with or without food.
You can get valerian root from these foods and drinks. Doses are typical per-serving estimates — actual content varies by brand, brew, cooking, etc.
400 mg per cup
1 cup from 2–3 g dried root, steeped 10 min. Bitter; take 30–60 min before bed.
Based on meta-analysis (n=1602) showing statistically significant improvement in subjective sleep quality but no improvement in objective polysomnography measures. Effect magnitude is conservative given mixed objective evidence.
Better subjective ratings of sleep
Subtle calming effect before bed
Some feel groggy the next morning
Valerian has an unpleasant odor
Avoid due to insufficient safety data
Not recommended for children under 12
Additive sedative effects
Increased sedation
Stop 2 weeks before surgery
Tip: Take earlier or reduce dose
Tip: May resolve with continued use
Tip: Take with food
Different mechanisms for sleep support
Melatonin for sleep timing, valerian for relaxation
Both support relaxation and sleep
Enhanced calming effect before bed
Traditional combination for sleep
Enhanced sleep support
Both enhance GABA activity
Stronger sleep and anxiety support
Valerian Root is generally safe at recommended doses, with a few precautions worth noting. The most commonly reported side effects are morning drowsiness, headache, GI upset. Use caution if any of these apply to you: Liver disease (rare cases of liver toxicity reported); Before surgery (may interact with anesthesia).
Kava
Probably helpsKavalactones produce anxiolytic and muscle-relaxing effects comparable to prescription anti-anxiety medications in clinical trials.
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