Quick answer: Magnesium may help you relax and fall asleep, especially if you’re running low on it. The best-tolerated form for sleep is magnesium glycinate (gentle on the stomach); magnesium citrate can loosen stools, and oxide is poorly absorbed. The evidence is modest — think “supportive,” not a sleeping pill.
How magnesium helps sleep
Magnesium supports the calming neurotransmitter GABA and helps regulate the nervous system, which is why many people find it relaxing before bed. Benefits are clearest in people who are deficient.
Which form to choose
Glycinate is the go-to for sleep — well absorbed and easy on digestion. Citrate works too but has a laxative effect at higher doses; oxide is cheap but poorly absorbed.
Dose and timing
Common sleep doses are around 200–400 mg in the evening. Start low, and check with a clinician if you have kidney issues or take medications. General wellness information, not medical advice.
Related answers
Build your sleep-recovery setup: see our sleep & recovery picks, or start with the complete sleep & recovery guide. General wellness information, not medical advice.
FAQ
Which magnesium is best for sleep?
Magnesium glycinate is best tolerated and well absorbed for sleep; citrate can loosen stools and oxide is poorly absorbed.
When should I take magnesium for sleep?
Most people take around 200–400 mg in the evening, roughly 30–60 minutes before bed.