Magnesium vs Melatonin
These two solve different sleep problems, and that's the whole answer. Melatonin is a circadian signal with moderate evidence: right for jet lag, shift work, and drifted schedules. Magnesium's direct sleep evidence is limited; it earns its evening slot when intake runs low or wind-down is the struggle.
Neither is a sedative, and neither replaces the sleep you're not giving yourself. Matched to the right problem, both are cheap and well tolerated.
| Attribute | Magnesium | Melatonin |
|---|---|---|
| Best for | Low intake, evening wind-down, restless muscles | Jet lag, shift work, drifted schedules |
| Evidence | Limited for sleep directly; moderate for adequacy roles | Moderate for circadian-related sleep issues |
| Daily dose | 100-350 mg elemental | 0.5-5 mg, lowest that works |
| When | Evening | 30-90 minutes before target bedtime |
| Watch for | 350 mg supplemental ceiling; kidney disease caution | Short-term use preferred; not for pregnancy |
Which one should you take?
Pick Magnesium if
your sleep is mostly fine but wind-down is hard, your diet runs low on magnesium, or you want something gentle enough for nightly use. Glycinate is the evening form.
Pick Melatonin if
the problem is when you sleep, not whether: travel, shifts, a bedtime that drifted late. Use the lowest effective dose and keep it short-term.
Can you take both?
Yes, and it's common: our catalog lists no interaction between them, and they work through different mechanisms. Magnesium in the evening, melatonin 30 to 90 minutes before your target bedtime. If the combination still fails, the full sleep guide has the wider stack.
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