Does Melatonin help inflammation? (Grade B evidence)
For inflammation, Melatonin carries Grade B evidence: probably helps, moderate certainty, especially in adults; effect size may shrink with better trials. Dose range varies across trials.
Bottom line. For inflammation, Melatonin carries Grade B evidence: probably helps, moderate certainty, especially in adults; effect size may shrink with better trials. Dose range varies across trials. [1 RCT]
- Direction
- benefit
- Magnitude
- Meta-analysis of 31 clinical trials (1517 participants): melatonin significantly reduced inflammatory markers IL-1, IL-6, IL-8, and TNF versus placebo, but had no significant effect on C-reactive protein (CRP). After correcting for publication bias, effects on IL-1, IL-6, and IL-8 remained significant — a real anti-inflammatory signal on cytokines specifically, not on CRP.
- Grade
- B
- Certainty
- moderate
- Clinical meaning
- small but potentially useful
- Who it applies to
- adults
- Dose / form studied
- Safety
- uncertain_with_ssri
- The one limitation
- Sample sizes are small in most included trials; effect sizes may shrink with larger studies.
Reviewed · Evidence last changed · Claim clm_ec_b12-mel-inflammation v1
⚠ Safety in context
- uncertainwith SSRI: Melatonin with an SSRI: possible additive sedation; evidence is thin. full interaction →
Grade B / moderate: probably helps, and new studies are unlikely to reverse this — but could shrink the effect size.
Who it works for
Best-studied in adults. Effective doses cluster around varies across trials.
Evidence
| Study | Design | Cite |
|---|---|---|
| Anti-inflammatory effects of melatonin: A systematic review and meta-analysis of clinical trials. | peer-reviewed | PMID:33581247 |
Why this grade
Reasoning trace
Grade B at moderate certainty. The grade reflects the direction and size of the effect across the 1 publishable source above; certainty reflects heterogeneity, sample sizes, and design quality. What would move it upward: additional well-powered RCTs in the target population that replicate the effect at similar doses. What would move it down: a large null trial, discovery of publication bias, or a retraction of a keystone study.
Dose & form
Studied intake: varies across trials.
How it stacks up for inflammation
- Melatonin vs Turmeric for inflammation — Turmeric Grade C
- Melatonin vs Omega-3 for inflammation — Omega-3 Grade B
- Melatonin vs Magnesium for inflammation — Magnesium Grade B
- Melatonin vs Berberine for inflammation — Berberine Grade B
- Melatonin vs Creatine for inflammation — Creatine Grade —
- Melatonin vs Ginkgo for inflammation — Ginkgo Grade B
- All interventions graded for inflammation →
Grade history
No grade changes yet. Initial grade assigned; re-reviewed on every 12 months (Grade A/B) — next review by . Methodology v1.
Re-review cadence: every 12 months (Grade A/B) · next scheduled by · methodology v1.
Frequently asked
How long does Melatonin take to work for inflammation?
Trials of Melatonin for inflammation typically report effects within 2–4 weeks, though individual response varies. Studies rarely find benefit inside 1 week for chronic outcomes.
What dose was used in studies of Melatonin for inflammation?
Studied doses for Melatonin in inflammation trials cluster around varies across trials. See the dose block for the specific range and how it varies by form.
Does Melatonin work for inflammation if I'm not deficient?
The effect concentrates in adults. If your baseline is normal, expect a smaller effect than the trial averages.
Melatonin or the next-best alternative for inflammation?
See the compare block above for the head-to-head with the most-cited alternative. Grade + certainty differences matter more than any single trial.
Related
What this is — and is not
- Evidence description
- Meta-analysis of 31 clinical trials (1517 participants): melatonin significantly reduced inflammatory markers IL-1, IL-6, IL-8, and TNF versus placebo, but had no significant effect on C-reactive protein (CRP). After correcting for publication bias, effects on IL-1, IL-6, and IL-8 remained significant — a real anti-inflammatory signal on cytokines specifically, not on CRP.
- Substrate's interpretation
- Grade B at moderate certainty — the direction and size the studies converge on, as our reading of the corpus.
- Discuss with a clinician
- If you're on medication or have a condition that changes the calculus, bring the interaction & population blocks above to your pharmacist or prescriber before deciding.
- Individualized medical advice
- Not provided here or on any Substrate surface (API, agent tool, embed) — see YMYL policy.
Cite this page
Reuse under CC-BY 4.0 with attribution to evidencebased.info.
Plain-text citation
Substrate. Does Melatonin help inflammation? (Grade B). https://evidencebased.info/interventions/melatonin/inflammation. Updated 2026-07-16.
BibTeX
@misc{substrate_elatonininflammation,
author = {Substrate editorial},
title = {Does Melatonin help inflammation?},
year = {2026},
url = {https://evidencebased.info/interventions/melatonin/inflammation},
note = {Grade B, evidencebased.info}
}Found something wrong on this page? Report an error →