Melatonin
A hormone involved in circadian timing. The evidence depends on the sleep question, timing, population and duration—not simply the number of milligrams on a label.
No FDA Daily Value, RDA, AI or UL
A larger labeled amount is not evidence of better sleep or greater safety.
Compare nutrient-reference terminology →What the research can—and cannot—support
Some uses involve timing-related questions; they should not be collapsed into a general insomnia claim.
Major guidelines cited by NCCIH do not find enough strong evidence to recommend melatonin for chronic insomnia.
Label accuracy has varied in tested products, making independent verification especially relevant.
Fields to verify on a real product
A familiar ingredient name is not enough to match a study or judge transparency.
Exact amount per serving
Immediate- or extended-release format
Directions and timing language
Independent identity and amount testing
Important reasons to pause
General information only. Suitability depends on the exact product, amount, health context and medication list.
- Long-term safety remains incompletely characterized.
- Drowsiness, headache, dizziness and nausea have been reported.
- Medication use, epilepsy, pregnancy, breastfeeding and use in children need professional context.
Primary and evidence-synthesis sources
- NCCIH: Melatonin — What You Need To KnowEvidence by use, product variability, safety and interaction context.