By the Proco Research Team
Magnesium is one of the most popular "natural sleep" supplements — but the evidence is more measured than the marketing.
A systematic review and meta-analysis of three randomised controlled trials in 151 older adults found magnesium reduced the time taken to fall asleep by roughly 17 minutes versus placebo. A real effect — but the authors themselves described the overall evidence as limited, with small studies.1 More recent randomised trials, including one on magnesium bisglycinate in adults reporting poor sleep, have added supportive data.2
The honest summary: magnesium may modestly help some people fall asleep faster, with the clearest case being people who aren't getting enough magnesium to begin with. It's not a sedative and it's not a guaranteed fix. Given magnesium glycinate is well tolerated and many adults under-consume magnesium anyway, it's a low-risk thing to try — just with realistic expectations.
Not medical advice. Supplements are not intended to diagnose, treat, cure or prevent disease.
References
- Oral magnesium supplementation for insomnia in older adults: a Systematic Review & Meta-Analysis. PMC. ncbi.nlm.nih.gov/pmc/articles/PMC8053283
- Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial. Nature and Science of Sleep. tandfonline.com/doi/full/10.2147/NSS.S524348