New evidence
Valerian and melatonin show 'substantial evidence' for insomnia in a scoping review of 405 adults — but the evidence is still called 'promising but inconclusive'.
This is among the first systematic reviews to formally rate valerian as having 'substantial evidence' for insomnia, but because it's a single early review that lumps together many small, unblinded clinical trials, the finding is a strong signal — not a settled fact.
A scoping review of 405 adults found that over-the-counter products like valerian and melatonin have 'substantial evidence' for improving insomnia symptoms, with no serious side effects. However, the authors themselves describe the overall evidence as 'promising but inconclusive', and the studies were done in a clinical population without blinding, so the results may not apply to everyone or withstand more rigorous testing.
Where this fits in the evidence
This is among the first studies we've indexed on Valerian for Improved Insomnia — treat it as an early signal until more research accumulates.
The study
Over-the-counter products for insomnia in adults: A scoping review of randomised controlled trials.
- Systematic Review
- n = 405
- 2025-05
- Sleep medicine
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.