Strong evidenceherb
Valerian for Poor Sleep Quality
Increases slow-wave sleep duration and reduces sleep latency through GABAergic mechanisms.
How strong is the research?
Strong evidence
Based on a meta-analysis of multiple studies — the highest level of research evidence.
Research source
SourceDonath F et al. · Pharmacopsychiatry 2000How much to take
400–900 mg
Improves subjective sleep quality without morning grogginess.