Research Gist
This systematic review and meta-analysis pooled results from approximately 36 randomised controlled trials examining valerian root and sleep. Meta-analysis combines data across multiple studies to identify patterns that individual trials may be too small to detect reliably. Across the pooled data, valerian was associated with improved sleep quality and reduced anxiety measures. The authors noted variability between studies in preparation type and dosage, which affects how confidently the findings can be generalised. One important detail: most trials used Valeriana officinalis, the European species, while Tagara refers to Valeriana wallichii, the Himalayan species used in Ayurveda.
Key Learnings
- Approximately 36 randomised controlled trials were pooled in the analysis.
- Valerian was associated with improved sleep quality across the pooled data.
- Anxiety measures also showed reduction in the analysed trials.
- Sleep difficulty and restlessness are recognised non-motor aspects of neurological wellness.
- Most trials used Valeriana officinalis; Tagara is the related Himalayan species V. wallichii.