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Magnesium for Sleep: Does It Work and Which Type Is Best?
The internet's favorite sleep mineral, reviewed against the actual evidence.
What the evidence actually shows
Magnesium plays a role in GABA signaling and melatonin regulation. Trials in older adults with insomnia show modest improvements in sleep onset, about 17 minutes faster in one meta-analysis, but evidence in younger, magnesium-replete adults is weaker.
Which form to choose
Magnesium glycinate is the most commonly recommended form for sleep due to good absorption and gentle GI profile. Citrate works but has a laxative effect at higher doses; oxide is poorly absorbed.
Dosing
200–400 mg of elemental magnesium, 1–2 hours before bed. Stay under the 350 mg supplemental upper limit unless your physician advises otherwise.
Frequently asked questions
- Can I take magnesium every night?
- For most healthy adults, yes, within the supplemental upper limit of 350 mg elemental magnesium. People with kidney disease should consult their doctor first.
Sources
- The effect of magnesium supplementation on primary insomnia in elderly (Journal of Research in Medical Sciences)
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or another qualified health provider with any questions you may have. Read our full medical disclaimer.
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