Valerian Root vs Melatonin: Which Sleep Aid Is Better?
Melatonin is a hormone that shifts your body clock and modestly shortens the time it takes to fall asleep. Valerian is an herb thought to calm the nervous system; studies are inconsistent, and some show no benefit over placebo. Melatonin is the better-supported choice, especially for jet lag or a delayed sleep schedule. Both can cause morning drowsiness.
Valerian has been used for sleep since ancient Greece; melatonin is a modern hormone supplement. Both are sold as gentle sleep aids. Here's how valerian root vs melatonin compares on evidence and safety.
Side-by-side
| Valerian root | Melatonin | |
|---|---|---|
| What it is | Herbal root extract | Hormone that signals darkness |
| How it may work | Affects GABA, a calming brain chemical | Shifts circadian timing |
| Evidence | Mixed; some reviews positive, others not | Modest but consistent for sleep onset; strong for jet lag |
| Typical dose | 300–600 mg extract before bed | 0.5–5 mg, 30–60 minutes before bed |
| Onset | May take weeks | Same night |
| Side effects | Headache, dizziness, morning drowsiness, stomach upset | Drowsiness, headache, vivid dreams |
What the research shows
Reviews of valerian found some studies reporting better sleep quality, but many trials were small and poorly designed, and the overall evidence is inconsistent. NCCIH notes that the research is not strong enough to say whether valerian helps.
Melatonin modestly shortens the time to fall asleep and is particularly useful for jet lag, shift work and delayed sleep-wake phase disorder.
Who should avoid them
- Pregnant or breastfeeding people: not enough safety data for either
- Children: ask a pediatrician before melatonin; valerian isn't recommended
- People taking sedatives, alcohol or anti-anxiety medicines: added drowsiness
- Liver problems: rare cases of liver injury have been linked to valerian products
The verdict
Melatonin is the better-supported option, especially for timing problems. Valerian may help some people but evidence is weak. Both are short-term aids; for ongoing insomnia, cognitive behavioral therapy for insomnia (CBT-I) has the strongest evidence. Also compare melatonin vs magnesium for sleep.
Frequently asked questions
Can you take valerian and melatonin together?
They're sometimes combined, but together they may add to drowsiness. Don't drive after taking them, and avoid alcohol.
How long does valerian take to work?
Some studies suggest effects build over 2–4 weeks of nightly use rather than working the first night.
Sources
This page is for education and is not a substitute for advice from your doctor. Read our medical disclaimer.