SupplementScience

Benefits of Magnesium

DJP
Reviewed by , MD, Board Certified Internal Medicine

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Evidence-Based Benefits

  • Sleep quality improvement — magnesium glycinate taken before bed has been shown to reduce sleep onset latency and improve sleep efficiency in multiple controlled trials
  • Muscle relaxation and cramp prevention — helps regulate calcium-mediated muscle contraction
  • Stress and anxiety reduction — modulates the HPA axis and GABA receptor activity
  • Bone health maintenance — approximately 60% of body magnesium is stored in bones
  • Blood sugar regulation — improves insulin sensitivity in people with type 2 diabetes
  • Migraine prevention — 400-600mg daily reduced migraine frequency by 41% in a 2016 meta-analysis

What the Research Says

Magnesium supplementation has a robust evidence base. A 2017 systematic review in Nutrients analyzed 40 studies and concluded that magnesium supplementation significantly improves subjective measures of anxiety (p<0.01). For sleep, a 2022 meta-analysis of 8 RCTs (n=2,132) found that magnesium supplementation reduced sleep onset latency by an average of 17 minutes. The evidence for migraine prevention is particularly strong, with the American Academy of Neurology giving it a Level B recommendation.

Related Conditions

SleepAnxietyMuscle CrampsMigrainesBone Health
Full Magnesium Guide

References

  1. (). The Effects of Magnesium Supplementation on Subjective Anxiety and Stress—A Systematic Review. Nutrients. DOI
  2. (). The Role of Magnesium in Sleep Health. Journal of Research in Medical Sciences. DOI
  3. (). Effects of Intravenous and Oral Magnesium on Reducing Migraine: A Meta-analysis. Clinical Journal of Pain. DOI