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Melatonin is a hormone involved in night-time signaling and circadian timing. Supplement effects depend on the sleep problem and context; it is not a universal sleep treatment.
Also indexed as: N-acetyl-5-methoxytryptamine
Melatonin helps signal biological night. That is different from switching the brain off. Human sleep trials show modest average effects, and results vary between people and sleep conditions.
Systems mapping shows biological relevance, not a treatment recommendation or a patient CPI score.
No validated chemical structure is displayed in this edition.
Melatonin / MT1–MT2 / circadian timing
Melatonin helps signal biological night. That is different from switching the brain off. Human sleep trials show modest average effects, and results vary between people and sleep conditions.
Small average sleep improvements in the cited meta-analysis. Circadian timing and insomnia are different clinical questions.
A pooled average does not predict individual response. Long-term and pediatric questions require dedicated assessment.
PloS one · 2013 · Journal Article; Meta-Analysis; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't · PMID 23691095
Verified sample: 1,683 · Adults and children with primary sleep disorders across 19 studies
Modest average improvements in sleep onset, total sleep time and sleep quality.
Limitations: Heterogeneous populations and formulations; not a universal insomnia recommendation.
Citation metadata from PubMed, a service of the U.S. National Library of Medicine, NIH. A citation match is not a guarantee of study quality. Abstracts are not full-text reviews.
Drowsiness, headache and dizziness may occur. Supplement content can vary; avoid assuming natural means risk-free.
Pregnancy, breastfeeding and use in children warrant clinician assessment; do not self-treat unexplained persistent sleep problems.
Sedating medicines may increase drowsiness. A pharmacist should review anticoagulants and other concurrent medicines.
United States: sold as a dietary supplement, not an FDA-approved drug for disease treatment. Ingredient research does not validate every marketed product.
This is not an exhaustive safety list. Regulatory status varies by jurisdiction and product; investigational use is not approval.
A dedicated lesson has not been published for this ingredient yet. Explore the cited profile or ask the instructor.
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Education, not a prescription. Research summaries are not medical advice, dosing instructions, or an offer to sell. Mechanistic findings do not establish clinical effectiveness. US regulatory status is product- and indication-specific and may change. Discuss health decisions with a licensed clinician.
