Melatonin Dosage Chart
Melatonin is a hormone produced by the pineal gland that regulates the sleep-wake cycle. Contrary to popular belief, effective doses are far lower than what most OTC supplements contain (often 5–10 mg). Research consistently shows 0.5–1 mg is physiologically active; higher doses increase side effects without proportional benefit.
Melatonin Dosage by Age Group
| Age Group | Age Range | Dose Range | Notes |
|---|---|---|---|
| Children (with physician approval) | 3–12 years | 0.5–1 mg | Lower doses preferred; short-term only |
| Adults — sleep onset | 18–64 years | 0.5–3 mg | 0.5–1 mg is effective; 3 mg maximum before escalating |
| Adults — jet lag | 18–64 years | 0.5–5 mg | Take at destination bedtime; 3–5 nights |
| Adults — circadian reset | 18–64 years | 0.5–1 mg | Lowest effective dose, consistent timing |
| Seniors (65+) | 65+ years | 0.5–2 mg | Natural melatonin production declines with age; supplement helps |
When and how to take Melatonin
Take 30–60 minutes before desired sleep time. Consistency in timing is more important than dose. Taking melatonin too early can shift circadian rhythm the wrong direction. For jet lag, take at the destination's target bedtime starting the day of travel.
Available Forms
Most common. Peaks in blood within 30–60 min. Best for sleep onset difficulty.
Most OTC products are 5–10 mg — consider cutting in half
Releases over 6–8 hours. Better for sleep maintenance (staying asleep).
Do not crush or split extended-release formulations
Fastest onset (15–20 min). Useful for very precise micro-dosing.
Easier to achieve 0.5 mg doses with drops
Safety Cautions
- Most commercial supplements (3–10 mg) exceed physiologically effective doses — drowsiness next morning is common.
- Not recommended for long-term nightly use in children without pediatrician guidance.
- May interact with blood thinners, immunosuppressants, and diabetes medications.
- Can cause vivid dreams, grogginess, or headache — typically dose-related.
- Not classified as a drug in the US (OTC supplement) but regulated as a hormone; quality varies by brand.
Frequently Asked Questions
How much melatonin should I take?
Start with 0.5 mg (500 mcg) taken 30–60 minutes before bed. This is physiologically active — your pineal gland produces only 0.1–0.3 mg naturally. If 0.5 mg is insufficient after 1–2 weeks, try 1 mg, then 2 mg. Few people need more than 3 mg for sleep onset. High-dose gummies (5–10 mg) are common but unnecessary for most adults.
Is 10 mg of melatonin too much?
For most adults, 10 mg is far above what's needed. Research shows melatonin's sleep-inducing effect plateaus at 1–3 mg for most people. Higher doses (5–10 mg) increase the risk of next-morning grogginess, vivid dreams, and hormonal disruption with long-term use. If you are currently taking 10 mg and feeling groggy, try stepping down to 3 mg, then 1 mg.
What is the melatonin dose for jet lag?
For jet lag, take 0.5–5 mg at the destination's target bedtime. Lower doses (0.5–1 mg) suffice for phase-shifting; higher doses (3–5 mg) provide more sedative effect. Continue for 3–5 nights. Eastward travel requires a phase advance (take earlier); westward requires a phase delay (take later).
Sources & References
- Buscemi N et al., BMJ 2006 — Melatonin efficacy and safety review
- Zhdanova IV, NEJM 1994 — Low-dose melatonin for sleep
- Arendt J, J Biol Rhythms 2010 — Melatonin and jet lag