According to clinical studies, melatonin typically takes 30-60 minutes to reach peak levels in your blood. However, the onset and duration can vary based on several factors:
- Formulation: Sublingual tablets work faster than regular pills
- Dosage: Higher doses may take longer to clear from your system
- Individual metabolism: Age, weight, and genetics play a role
For best results, take melatonin 30-60 minutes before your desired bedtime. The effects typically last 4-8 hours, though some people may experience longer duration. Regular use may be more effective than occasional use for establishing a consistent sleep pattern.
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Last Updated: August 28, 2025
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