Valerian
Research Reliability -
A traditional sedative herb that promotes relaxation, shortens sleep onset time, and improves overall sleep quality.
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
helps sleep onset
Weeks 1–2
effect often strengthens with consistent use
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.
Usage
Entry Dose
150mg
Standard Dose
300–600mg
Max Dose
900mg
Onset
30–60 min (acute); 2 weeks (sustained)
Combinations
Pairs well with
Synergistic
Melatonin — melatonin triggers circadian onset; valerian reduces sleep anxiety via GABA
Magnesium glycinate — combined GABAergic and NMDA-modulating calming for sleep quality
Lemon balm — traditional combination; lemon balm amplifies valerian's GABA-A binding
Avoid combining
Contraindicated
Sedatives / benzodiazepines — additive CNS depression; excessive sedation and impairment risk
Alcohol — combined CNS depressant effect; avoid evening alcohol when using valerian
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.
Preliminary (limited / small human data)
Meta-analysis found suggestive but methodologically inconsistent evidence; individual trial quality varies considerably.
Bent S et al. (2006). American Journal of Medicine. Meta-analysis (valerian and sleep quality). PMID: 17145239.