Best Magnesium for Sleep: What the Evidence Says
Magnesium is one of the most popular natural sleep aids going, so the evidence deserves a plain summary. People who consume more magnesium tend to report better sleep in observational studies, but studies like that can’t prove cause. The trial evidence is thinner than the popularity suggests: a 2021 meta-analysis of three small randomised trials in older adults found people fell asleep around 17 minutes faster on magnesium than on placebo, total sleep time didn’t improve significantly, and the trials themselves were rated low to very low quality.
Add it up and you get a modest picture. Magnesium may help some people fall asleep a little faster, most plausibly the people who were low in magnesium to begin with. At a few dollars a month it’s a cheap experiment. It is not a sleeping pill.
If you want to try it: [magnesium glycinate](/magnesium-glycinate) is the usual pick. It absorbs well, doesn't upset the stomach, and the glycine it's bound to has gentle sleep links of its own. Evening is the common time to take it.
Sources: oral magnesium for insomnia in older adults, systematic review & meta-analysis, 2021 (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8053283/); systematic review of magnesium for anxiety and sleep (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11136869/)
This article is general information, not medical advice. If sleep problems persist, speak to a doctor.