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Valerian Root for Insomnia

A Strong Evidence Multiple large clinical trials consistently show significant benefits.

Based on 105 studies (25 meta-analyses, 14 RCTs) with 11,983 total participants. 54/105 studies show positive effects.

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A

The Bottom Line

Valerian root is one of the most studied herbal supplements for insomnia, and research suggests it may offer modest sleep benefits, though results are not universal.

  • 41 studies with 9,762 participants — one of the most researched herbal sleep aids
  • 8 meta-analyses provide substantial evidence synthesis
  • About 56% of studies show positive effects — benefits may be modest
  • Differences in preparations and dosing may explain why results vary across studies

Key Study Findings

review
Nutritional Supplements for Healthy Aging: A Critical Analysis Review.
Dose: None vs: Placebo Effect: None None
Other
Discovery of natural orexin 2 receptor antagonists from Valeriana species: A potential approach for insomnia …
Dose: None vs: Suvorexant Outcome: OX2R antagonist binding affinity (in silico) Effect: None None

Population: In-silico molecular docking study

Other
Telocytes Mediating the Effects of GABA-Herbal Medicine Composite on Insomnia.
Dose: None vs: Insomnia model without treatment Outcome: Serotonin content and sleep quality Effect: None None

Population: Healthy and insomnia rats

Other
Exploring the Effects and Mechanisms of Valerian Volatile Oil in Treating Insomnia Using Network Pharmacology, …
Dose: 100 mg/kg VVO (high dose) vs: Control mice Outcome: Sleep latency, sleep duration, MAOB expression Effect: None None

Population: Mouse insomnia model with network pharmacology

Randomized Controlled Trial n=40 3 weeks Double-blind
Effects of a Valerian-Hops Extract Combination (Ze 91019) on Sleep Duration and Daytime Cognitive and …
Dose: None vs: Placebo Outcome: Sleep duration (Fitbit tracker) Effect: Mean +21.7 min/night; shortest night +48.7 min 0.019

Population: Adults with occasional sleep problems

Key Statistics

105

Studies

11983

Participants

Positive

A

Grade

Referenced Papers

American journal of … 2025 6 citations
Phytotherapy research : … 2024 14 citations
European neuropsychopharmacology : … 2024 9 citations
Current topics in … 2024 4 citations
Molecules (Basel, Switzerland) 2022 90 citations
Combinatorial chemistry & … 2021 16 citations
Advances in experimental … 2021 7 citations
Journal of medicinal … 2018 19 citations
Clinical therapeutics 2016 328 citations
Sleep medicine reviews 2015 152 citations
Sleep medicine reviews 2011 317 citations
Phytomedicine : international … 2010 148 citations
Australian family physician 2010 58 citations
Clinics in geriatric … 2008 53 citations
Sleep medicine reviews 2007 150 citations
Journal of ethnopharmacology 2007 36 citations
The American journal … 2006 400 citations
Prescrire international 2005 2 citations
Integrative cancer therapies 2004 59 citations
American journal of … 2003 85 citations
American family physician 2003
Progress in neuro-psychopharmacology … 2002 82 citations
Disease-a-month : DM 2002 75 citations
Primary care 2002 43 citations
Tidsskrift for den … 2002 12 citations
Phytotherapy research : … 2001 74 citations
CNS spectrums 2001 30 citations
Zeitschrift fur arztliche … 2001 3 citations
Cultural diversity & … 2000 35 citations
American journal of … 1999 226 citations
Psychosomatic medicine 1999 136 citations
Drugs & aging 1999 36 citations
Journal of the … 1999 24 citations

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

Commonly Used Dosages

sleep:
300-600 mg standardized extract, 30 min before bed

Upper limit: Not established

Dosages Studied in Research

Dosage Duration Effect N
None -- Positive --
None -- Mixed --
None -- Positive --
None -- Positive --
100 mg/kg VVO (high dose) -- Positive --
None 3 weeks Positive 40
None -- Positive --
None -- Positive 51

Best taken: 30-60 minutes before bed; may require 2-4 weeks for full effect

Safety & Side Effects

Reported Side Effects

  • Headache
  • Dizziness
  • GI upset
  • Morning grogginess
  • Vivid dreams

Known Interactions

  • Sedatives and alcohol — additive CNS depression
  • CYP3A4-metabolized drugs — valerian may inhibit this enzyme
  • Benzodiazepines — potential additive GABA effects

Tolerable upper intake: Not established

Always consult your healthcare provider before starting any supplement.

Frequently Asked Questions

Does Valerian Root help with Insomnia?
Based on 105 studies with 11,983 participants, there is strong evidence from multiple clinical trials that Valerian Root may support Insomnia management. Our evidence grade is A (Strong Evidence).
How much Valerian Root should I take for Insomnia?
Studies have used various dosages. A commonly studied range is 300-600 mg standardized extract, 30 min before bed. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of Valerian Root?
Reported side effects may include Headache, Dizziness, GI upset, Morning grogginess. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for Valerian Root and Insomnia?
We rate the evidence as Grade A (Strong Evidence). This rating is based on 105 peer-reviewed studies with 11,983 total participants. The overall direction of effect is positive.

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