Valerian root in treating sleep problems and associated disorders - a systematic review and meta-analysis
Key Finding
Valerian consistently improved sleep quality across 60 studies, with enhanced effects when combined with hops or lemon balm.
Plain-English Summary
This updated meta-analysis examined 60 studies on valerian for sleep and associated disorders including anxiety and restless legs syndrome. The review covered both mono-preparations and combinations with other herbs.
Valerian was consistently associated with improved sleep quality across diverse populations. When combined with hops or lemon balm, effects were enhanced. The herb also showed benefits for anxiety symptoms that contributed to sleep difficulties.
This comprehensive review confirmed valerian's position as one of the most studied herbal sleep aids. The herb's effects on GABA metabolism, adenosine receptors, and serotonin pathways explain its broad sleep-promoting actions. Valerian has no known tolerance, dependence, or withdrawal risks, making it suitable for long-term use.