Valerian
Research Reliability -
A traditional sedative herb studied for sleep onset. Results are mixed — some people find it clearly helpful and others notice nothing at all.
Appetite
Mood
Sleep
Valerian
Description
Valerian root (Valeriana officinalis) is one of the most widely used botanical sleep aids in Europe and North America, with a documented history stretching back to ancient Greece and Rome. Its active compounds, including valerenic acid and isovaleric acid, are thought to modulate GABA receptors in the brain, producing anxiolytic and sedative effects without the dependency risk associated with pharmaceutical sleep aids. Research supports its ability to reduce the time needed to fall asleep and improve self-reported sleep quality, particularly in people with mild to moderate insomnia. Best taken 30-60 minutes before bed.
Effects
First night
drowsiness within an hour for many
Same night
Weeks 1–2
How It Feels
Sedating within the hour for most, though a small minority get the opposite and feel wired, so test it on a low-stakes night. The smell and taste are famously unpleasant, which is why capsules win. Some morning grogginess is possible at higher doses.
Evidence
Evidence Strength
Preliminary (limited / small human data)
Caveats
Meta-analysis found suggestive but methodologically inconsistent evidence; individual trial quality varies considerably.
Usage
Commonly Referenced Starting Amount
300 mg extract before bed
Commonly Referenced Amount
300–600 mg extract before bed is the typical research dose, though a Cochrane review found the sleep evidence inconsistent overall
Referenced Upper Limit
No upper limit has been established
Onset
30–60 min (acute); 2 weeks (sustained)
Biomarkers to Track
Subjective
(Daily)
Sleep onset latency (mins)
Sleep quality score (1–10)
Anxiety level before bed
Objective
(Quarterly)
HRV baseline (sleep quality)
Cortisol awakening response
Liver enzymes ALT/AST (long use)
Generally safe. It is sedating and adds to other sedatives and alcohol.
Pregnant women, and anyone combining it with sleep or anti-anxiety medication or driving after.
Taking it before driving, and giving up after one night when a minority feel wired instead.
Disclaimer
This information is for educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure, or prevent any disease. Consult a qualified healthcare provider before starting any new supplement, especially if you are pregnant, nursing, taking medication, or managing a health condition.
Bent S et al. (2006). American Journal of Medicine. Meta-analysis (valerian and sleep quality). PMID: 17145239.
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