Evidence-backed FAQ
Does magnesium help sleep?
The human evidence is limited. A meta-analysis of three small trials in older adults with insomnia found that magnesium shortened the time to fall asleep by about 17 minutes versus placebo, while the increase in total sleep time was not statistically significant.[1]
What the evidence shows
A broader systematic review found observational associations between magnesium and sleep quality, but randomized trials were contradictory and uncertain.[1], [2]
Important limitations
The randomized evidence involved only 151 older adults with insomnia and was rated low to very low quality, so the apparent sleep-onset effect is preliminary and may not apply to younger people or those without insomnia.[1], [2]
Related questions
- Did magnesium increase total sleep time?
- Who was studied?
Read the full evidence summary
This FAQ is the concise answer. The linked research page provides the full study context, populations, doses, outcomes, and limitations.
References
- Oral magnesium supplementation for insomnia in older adults: a Systematic Review & Meta-Analysis.. BMC complementary medicine and therapies. 2021. Systematic review and meta-analysis View source →
- The Role of Magnesium in Sleep Health: a Systematic Review of Available Literature.. Biological trace element research. 2023. Systematic review View source →