Is Magnesium Good for Sleep? Written by Kara Rogers Kara Rogers is the senior editor of biomedical sciences at Encyclopædia Britannica, where she oversees a range of content from medicine and genetics to microorganisms. She joined Britannica in 2006 and... Kara Rogers Fact-checked by Britannica Editors Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Britannica Editors Last updated Mar. 6, 2026 •History Despite its reputation as a natural sleep remedy, magnesium is not a cure for insomnia or other sleep disorders. Evidence supporting its effectiveness in otherwise healthy individuals is limited and inconclusive. Many studies on magnesium supplementation for sleep have involved small sample sizes or methodological limitations, making it difficult to draw firm conclusions. Magnesium is a natural calming substance, which is one reason many people turn to it for sleep support. It plays a role...

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