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    Ingredient guide · Ingredient reference

    Is melatonin good for depression?

    Melatonin is not a well-established antidepressant treatment. Improving a sleep-timing problem may be useful in an individual care plan, but it is not the same as treating depression. Research has produced mixed results, and a favorable subgroup finding does not justify replacing established care.

    Read the evidence ↓

    Supplement Science Insights Editorial Team

    Published September 23, 2026

    The overall pooled result was uncertain

    A 2022 systematic review included 19 studies with 1,178 participants. Its overall analysis did not find a statistically significant improvement in depressive symptoms, although one rating-scale subgroup favored melatonin. This pattern supports uncertainty rather than a universal benefit claim. [1]

    Different populations limit a single conclusion

    The review combined differing symptom scales, underlying conditions, doses and treatment durations. It could not identify which specific type of depression might benefit. A positive result on one scale cannot establish an effective self-treatment regimen for major depression. [1]

    Treat persistent low mood directly

    NHS depression care includes assessment and options such as guided self-help, talking therapies and medicines according to severity and need. NHS melatonin guidance also advises contacting a clinician if low or sad feelings develop during use. Do not stop prescribed antidepressants or substitute a sleep supplement without review. [2][3]

    Keep separate goals in the care plan

    Imagine someone falls asleep earlier but still has persistent low mood and loss of interest. That is not evidence that the depression is adequately treated. Discuss both sleep and mood outcomes so the treatment plan addresses the condition, not only bedtime. [2][1]

    Hypothetical example — separate sleep from mood benefit
    OutcomeInterpretation
    Earlier sleep onsetA sleep outcome
    Lower symptom scoreRequires reliable comparison
    Positive subgroupNot universal efficacy
    Persistent low moodNeeds depression assessment
    Is melatonin good for depression? — original article outline diagram
    Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

    Sources for this article

    1. The Therapeutic Effect of Exogenous Melatonin on Depressive Symptoms: A Systematic Review and Meta-Analysis - PMC
      Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.
    2. Treatment - Depression in adults - NHS
      Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.
    3. Side effects of melatonin - NHS
      Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.