Herbal Sedative
Valerian Root
A calming herb traditionally used to improve sleep quality and reduce anxiety.
KÖGN Health grades Valerian Root as B (Moderate evidence) and rates it 3.8 out of 5.
Last reviewed · June 2026
Primary effects
- Improved sleep
- Reduced anxiety
- Relaxation
How it works
Enhances GABA activity, promoting relaxation and sleep onset.
Overview
Valerian Root is commonly used as a natural sleep aid due to its calming effects on the nervous system. It works primarily through GABAergic pathways, helping reduce mental hyperactivity and promote sleep onset. Its effects can vary between individuals, and it is generally best used in the evening rather than during the day.
The evidence
Valerian is a traditional sleep and anxiety herb thought to act on GABA signalling. Meta-analyses suggest it may subjectively help people fall asleep, but the trials are of low quality and inconsistent, and objective sleep measures rarely improve. It is a mild, safe sleep aid with modest, uncertain benefit rather than a cognitive enhancer.
How to dose it
Sleep studies commonly use 300–600 mg of a root extract, taken 30–120 minutes before bed.
When to take it
Acute — taken before sleep; some benefit may build over a couple of weeks.
Safety & side effects
Generally well tolerated; morning grogginess, vivid dreams or (paradoxically) mild stimulation can occur.
Who should avoid it
It can add to the effect of sedatives, alcohol and other sleep medicines — don't combine without advice, and avoid driving after taking it. Safety in pregnancy is not established.
References
Related ingredients
Graded entries that target the same cognitive goals.
Categories
Draft — the dose, safety and evidence notes on this entry were prepared from the published literature and are pending editorial and clinical review.
Educational information, not medical advice. The evidence grade is KÖGN’s editorial assessment of published research, not a health claim. Speak to a qualified clinician before changing what you take.