Valerian Root
Also known as: Valeriana officinalis, garden valerian, all-heal, setwall
Effective Dosage
530–1060 mg daily based on study doses
What the Science Says
Valerian root is a flowering plant whose root has been used for centuries as a natural sedative and calming agent. Clinical trials show it can meaningfully improve sleep quality — including how fast you fall asleep, how long you sleep, and how rested you feel — particularly when taken nightly for several weeks at doses around 530–1060 mg. There is also early evidence it may reduce anxiety-related brain activity and help protect cognitive function in high-stress medical situations, though these findings need more research.
What It Doesn't Do
Not a proven treatment for clinical anxiety disorders — one well-designed trial found no significant difference from placebo on anxiety symptom scales. Won't work like a sleeping pill — effects build over weeks, not one night. No solid evidence it treats ADHD or autism on its own; studies used it in multi-herb combinations. Don't expect it to boost energy, build muscle, or detox anything.
Evidence-Based Benefits
Valerian root extract has shown improvements in sleep quality (total quality, latency, duration, efficiency) in post-surgical patients over 30 nights compared to placebo (PMID: 33420602). One RCT found it may reduce odds of early postoperative cognitive dysfunction after CABG surgery (OR=0.108) (PMID: 25173770). An EEG-based RCT found valerian altered functional brain connectivity (increased frontal alpha coherence, decreased theta coherence) correlated with anxiolysis, though no significant between-group differences on clinical anxiety scales were observed (PMID: 30632220).
Weak EvidenceEffective at: 530–1060 mg/day based on clinical trial doses
Source: auto-research
Absorption & Bioavailability
Unknown — no pharmacokinetic data provided in the supplied studies. Aqueous and standardized extracts are commonly used in trials, but absorption rates are not characterized in this evidence set.
Red Flags to Watch For
- Vaping products labeled 'valerian root' have been found to contain dangerous synthetic cannabinoids — vaping any product with this label carries serious risk
- Potential interactions with tricyclic antidepressants flagged in pharmacy literature — consult a pharmacist or doctor if you take any antidepressants
- Not recommended during pregnancy — teratology animal studies used very high doses and human safety data is absent from the provided evidence
- Products vary widely in metal impurity levels (copper, manganese, zinc, nickel, chromium) — buy from brands that test to pharmaceutical-grade standards
- Most clinical evidence comes from specific populations (post-surgery patients, stressed volunteers) — results may not generalize to healthy adults with chronic insomnia
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06