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Melatonin vs Magnesium for Sleep

Different mechanisms, different use cases

THE WINNERIt Depends

Melatonin wins for jet lag and schedule shifting. Magnesium wins for relaxation and staying asleep. For general sleep improvement, try magnesium first. It addresses deficiency (common) without the next-day grogginess.

Head-to-Head Comparison

BioavailabilityVariable (15-50%)
Cost$
Time to Work30-60 minutes
Best For
Jet lagShift workersResetting sleep scheduleFalling asleep
Not Best For
Staying asleepDaily long-term useAddressing root causes
Side Effects

Grogginess next day, vivid dreams, dependency concerns

Key Fact: Signals to your body that it's time for sleep. Doesn't sedate you. Best for timing, not depth.

Bioavailability80% (glycinate form)
Cost$$
Time to Work2-4 weeks for full effect
Best For
Muscle relaxationStaying asleepAnxiety-related insomniaLong-term use
Not Best For
Quick knockoutsJet lag
Side Effects

Minimal at normal doses, loose stools if overdone

Key Fact: Most people are deficient. Fixing deficiency often improves sleep indirectly.

Which One For Your Goal?

Your GoalWinner
Jet lag recoveryMelatonin
Falling asleep fasterMelatonin
Staying asleepMagnesium
Anxiety-related insomniaMagnesium
Long-term useMagnesium
Cost effectivenessTie

Myth vs Reality

Myth: "Melatonin is a sleeping pill." Reality: Melatonin signals sleepiness, it doesn't knock you out. Taking more doesn't make you sleepier. In fact, doses over 1mg often work worse than 0.5mg.

Why It Depends Sometimes

Melatonin for timing issues (jet lag, schedule reset). Magnesium for overall sleep quality and relaxation. Many people benefit from both. If you're just looking for general sleep improvement, start with magnesium.

Common Questions

Yes, they work through different mechanisms. Magnesium at night, low-dose melatonin 30 min before bed.

The Bottom Line

Try magnesium glycinate first for general sleep issues. Use melatonin for jet lag or schedule resets. Both can work together.

More Showdowns

About this information: Our recommendations draw from peer-reviewed clinical trials, systematic reviews, and the same medical databases your doctor uses. These statements have not been evaluated by the FDA. Supplements are not intended to diagnose, treat, cure, or prevent any disease.

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