What Is Valerian and What Does It Do?
Valerian (Valeriana officinalis) is a flowering herb whose root has been used in traditional European herbalism for centuries as a sedative and sleep aid. Its active compounds include valerenic acid, isovaleric acid, and a range of antioxidant flavonoids. Valerian benefits are thought to arise partly through modulation of GABA signalling — the same inhibitory neurotransmitter pathway targeted by benzodiazepine drugs, though through milder and different mechanisms.
At maxfit.ee, sleep and relaxation products including herbal options are available in the uni-ja-loogastus category. Products such as ICONFIT Capsules Good Sleep N90 and OstroVit Lemon Balm VEGE 90caps are popular options for those looking to support sleep naturally.
Primary Evidenced Benefits
Sleep Onset and Quality
The strongest clinical evidence for valerian concerns sleep. Bent et al. (2006) conducted a systematic review of 16 randomised, placebo-controlled trials and concluded that valerian may improve sleep quality without side effects. The effect on subjective sleep quality was more consistently positive than objective measures like polysomnography. Most trials used 300–600 mg of aqueous root extract taken 30–60 minutes before bed.
Anxiety and Relaxation
Some trials have examined valerian for anxiety. Evidence here is more heterogeneous — some studies show modest anxiolytic effects, particularly for situational or mild anxiety, while others show no difference from placebo. The mechanisms (GABAergic modulation) are biologically plausible, but larger, well-controlled trials are needed before strong conclusions can be drawn.
Secondary and Emerging Effects
Smaller studies have explored valerian for menopausal symptoms, particularly hot flushes combined with sleep disruption. Preliminary results are mixed. A 2013 trial by Taavoni et al. found valerian supplementation had a positive effect on hot flush severity and frequency in postmenopausal women, though the study was small and results require confirmation in larger trials.
Where Evidence Is Weak
Valerian has been marketed for a broad range of conditions including ADHD, restless legs syndrome, and depression. Evidence for these uses is either very preliminary (one or two small trials) or largely absent. It would be misleading to present valerian as beneficial for these conditions based on current data.
Who Gains Most
Based on available clinical evidence, the people most likely to benefit from valerian are:
- Adults with mild to moderate difficulty falling asleep or achieving restful sleep
- Those seeking a non-pharmaceutical option as part of a broader sleep hygiene approach
- Individuals with mild situational anxiety who have also been shown some benefit in smaller trials
Valerian appears less useful for individuals with severe insomnia, chronic anxiety disorders, or conditions requiring clinical intervention.
Realistic Expectations
Valerian is not a sedative in the same class as prescription sleep medications. Most trials show modest improvements in subjective sleep quality — shortening the time to fall asleep and reducing nighttime wakefulness — rather than dramatic effects. Consistent use over 2–4 weeks appears necessary before effects are reliably noticed, which contrasts with the faster onset of pharmaceutical agents.
FAQ
Can I take valerian every night?
Short-term daily use (up to 4–6 weeks) is generally considered safe in the published literature. Long-term safety data beyond this period are limited. Taking breaks from valerian use and not using it in combination with other sedatives or alcohol is advisable.
Does valerian work immediately?
Some individuals notice mild relaxation effects on the first night, but the full sleep-supporting effects typically require consistent use over 2–4 weeks. This is consistent with most published trial durations.
Can valerian interact with medications?
Valerian may potentiate the effects of other CNS-depressant drugs including sedative antihistamines, benzodiazepines, and alcohol. If you take any of these, consult a healthcare provider before adding valerian. It may also interact with certain CYP3A4-metabolised drugs.
References
Bent, S., Padula, A., Moore, D., Patterson, M., & Mehling, W. (2006). Valerian for sleep: a systematic review and meta-analysis. American Journal of Medicine, 119(12), 1005–1012. https://pubmed.ncbi.nlm.nih.gov/17145239/
Taavoni, S., Ekbatani, N., Kashaniyan, M., & Haghani, H. (2011). Effect of valerian on sleep quality in postmenopausal women: a randomized placebo-controlled clinical trial. Menopause, 18(9), 951–955. https://pubmed.ncbi.nlm.nih.gov/21775910/
Ferreira, J. F., Janick, J., & Simon, J. E. (1997). Valerian (Valeriana officinalis L.): A review of its ethnobotany, biology, phytochemistry, and pharmacology. In J. Janick (Ed.), Proceedings of the First International Symposium on the Chemistry of Valerian, referenced in: Yuan, C. S., Mehendale, S., Xiao, Y., Aung, H. H., Xie, J. T., & Ang-Lee, M. K. (2004). The gamma-aminobutyric acidergic effects of valerian and valerenic acid on rat brainstem neuronal activity. Anesthesia & Analgesia, 98(2), 353–358.
