Valerian Root
Valerian is a herbal extract from Valeriana officinalis root used for insomnia and mild anxiety. Its constituents interact with GABA signalling and adenosine receptors. Evidence for sleep benefit is inconsistent, with many trials showing small or non-significant effects, but it is generally well tolerated with low dependence risk.
01 Overview
Valerian preparations contain valerenic acid, valepotriates and other compounds. Valerenic acid modulates GABA-A receptors, which may underlie mild sedative and anxiolytic effects. Systematic reviews report mixed sleep outcomes, partly due to heterogeneous extracts and study quality.
It is commonly combined with hops or lemon balm in sleep formulas. Adverse effects are usually mild; a paradoxical stimulation or vivid dreams occur in some users. Rare hepatotoxicity has been reported, often with multi-herb products.
02 Mechanism
Valerenic acid acts as a positive allosteric modulator of GABA-A receptors and may inhibit GABA breakdown and reuptake; constituents also interact with adenosine and serotonin receptors, producing mild sedation.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Sleep | 300–600 mg | Oral | Extract taken 30-120 minutes before bed; effects may build over weeks. |
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| Improved subjective sleepSome users report easier sleep onset and quality; trial evidence is mixed. | Small / inconsistent | Observational | |
| Mild anxiolysisReported reduction in daytime tension, with limited controlled support. | Mild | Anecdotal |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| Daytime drowsiness / grogginessResidual sedation or morning grogginess, especially at higher doses. | Mild | Uncommon | Observational | |
| Paradoxical stimulation / vivid dreamsSome users experience restlessness or unusually vivid dreams. | Mild | Rare | Anecdotal |