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Head-to-head evidence comparison — which supplement is right for you?
Melatonin wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
14 of 19 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mostly mechanism / observational
1 of 1 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Melatonin and Valerian Root have evidence — compare verdict strength side-by-side.
0.5-1mg
30-60 minutes before bed
Immediate-release tablet or sublingual
300-600mg extract
30-60 minutes before bed
Standardized extract capsules
May cause excessive sedation or morning grogginess
May have additive effects when combined. Take earlier if groggy.
Same night
1-3 days
Next morning
First week
2-4 weeks
30-60 minutes
Next morning
Immediate
Melatonin in cancer treatment
The Cochrane database of systematic reviews (2025) · Meta analysis · n=126
We downgraded the certainty of the evidence because of high risk of bias, small sample size, the width of the 95% confidence interval, and indirectness due to inadequate reporting of cancer type.
Comparative Efficacy, Tolerability, and Acceptability of Donanemab, Lecanemab, Aducanumab, Melatonin, and Aerobic Exercise for a Short Time on Cognitive Function in Mild Cognitive Impairment and Mild Alzheimer's Disease: A Systematic Review and Network Meta-Analysis
Journal of Alzheimer's disease : JAD (2024) · Meta analysis · n=4599
Melatonin may be a better potential disease-modifying treatment for cognitive decline in mild AD and MCI.
Melatonin for sleep disorders in people with autism: Systematic review and meta-analysis
Progress in neuro-psychopharmacology & biological psychiatry (2023) · Meta analysis · n=595
According to the global analysis, the wake after sleep onset and night awakening parameters were not statistically significant.
Valerian Root in Treating Sleep Problems and Associated Disorders-A Systematic Review and Meta-Analysis
Journal of evidence-based integrative medicine (2020) · Meta analysis · n=6894
In addition, therapeutic benefits could be optimized when it was combined with appropriate herbal partners.
Fixed herbal drug combination with and without butterbur (Ze 185) for the treatment of patients with somatoform disorders: randomized, placebo-controlled pharmaco-clinical trial
Phytotherapy research : PTR (2009) · Rct · n=182
Analysis of the ITT population confirmed these results.
Herbal Medicines in Autism Spectrum Disorder: Therapeutic Potential, Plant Components, and Dosage Guidelines
Alternative therapies in health and medicine (2025) · Systematic review
Systematic review examining Valerian Root efficacy
Based on meta-analyses showing 7-12 minute reduction in sleep onset. Higher doses showed diminishing returns and increased morning grogginess. Sublingual forms may be more effective at lower doses.
Based on meta-analysis (n=1602) showing statistically significant improvement in subjective sleep quality but no improvement in objective polysomnography measures. Effect magnitude is conservative given mixed objective evidence.
AI-estimated from published studies. Interpret as directional guidance.
Melatonin has a higher evidence score (9/10 vs 7/10) and wins in 3 of 3 categories.
For fall asleep faster, Melatonin has a higher relevance score (95 vs 70).
May cause excessive sedation or morning grogginess May have additive effects when combined. Take earlier if groggy. Consult a healthcare provider for personalized advice.