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Melatonin FAQ: Dosage and Formulation Comparison
Choosing the right melatonin formulation depends on the intended outcome. Circadian phase-shifting, sleep maintenance, or antioxidant effects. The table below compares the most common research and clinical formulations based on pharmacokinetics, typical applic
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This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Choosing the right melatonin formulation depends on the intended outcome. Circadian phase-shifting, sleep maintenance, or antioxidant effects. The table below compares the most common research and clinical formulations based on pharmacokinetics, typical applications, and practical considerations.
- Immediate-Release (IR)
- 0.3–5mg
- 30–60 minutes
- 3–4 hours
- Circadian phase-shifting, sleep onset facilitation, jet lag protocols
- Best for phase-shifting when timed to DLMO; less effective for sleep maintenance
- Sustained-Release (SR)
- 1–6mg
- 90–150 minutes
- 6–8 hours
- Middle-of-the-night awakenings, age-related insomnia, sleep maintenance
- Superior for older adults with reduced endogenous production; mimics natural secretion curve
- Sublingual IR
- 0.5–3mg
- 15–30 minutes
- 2–3 hours
- Rapid onset for acute insomnia, shift work sleep disorder
- Fastest onset but shortest duration; useful when immediate effect is required
- High-Dose Research (oral)
- 10–50mg
- 30–90 minutes
- 4–6 hours
- Neuroprotection studies, oxidative stress models, immune modulation research
- Doses exceed receptor saturation; effects are primarily antioxidant rather than circadian