Melatonin vs Magnesium Glycinate
Both are marketed for sleep but they do different things. Melatonin is a circadian-timing hormone: useful when your clock is off. Magnesium glycinate is a relaxant: useful when your body is wound up at bedtime.
| Factor | Melatonin | Magnesium Glycinate |
|---|---|---|
| Mechanism | Circadian signal | GABA / nervous-system calming |
| Best for | Jet lag, shift work, delayed sleep | Tension, anxiety, sleep quality |
| Typical dose | 0.3–1 mg (lower is better) | 200–400 mg elemental |
| Timing | 30–60 min before bed | Evening, with dinner or before bed |
| Onset | Same night | Days to weeks for full effect |
| Morning grogginess | Possible at higher doses | Rare |
When to pick each
Pick melatonin if…
You can't get to sleep because your circadian timing is off — jet lag, shift work, late-night screens pushing your onset. Low doses (0.3–1 mg) work as well as high doses and leave you sharper in the morning.
Pick magnesium glycinate if…
You can fall asleep but feel keyed up at bedtime, grind your teeth, wake frequently, or run low on dietary magnesium. Expect improvements over 1–2 weeks.
Frequently asked
- Can I take both together?
- Yes, and the stack is common. They work on different parts of the sleep problem. Just start each one individually so you know what's helping.
- Is melatonin safe for nightly use?
- Low doses (0.3–1 mg) are generally safe long-term. Higher over-the-counter doses (5–10 mg) can disrupt next-day sleep timing and morning alertness.
- Which one is better for kids?
- Talk to a paediatrician. If either is used, low-dose melatonin has more paediatric data. Magnesium glycinate is reasonable for teens but dosing should be weight-adjusted.
Want our pick for you?
Comparisons are useful, but the right answer depends on your goals, diet, medications, and what's already in your stack. Take the 2-minute quiz — we'll pick the form and dose for you.
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