Muscle cramps and magnesium deficiency: case reports
Bilbey DL, Prabhakaran VM
Published in Canadian Family Physician
Abstract
Review examining relationship between magnesium deficiency and muscle cramping, with evidence for supplementation benefits.
Methodology
Two clinical case reports describing patients with florid magnesium deficiency presenting with severe muscle pain and cramping, and their response to magnesium repletion.
Key Findings
Both patients presented with persistent, severe muscle cramps and pain attributable to documented magnesium deficiency, and symptoms resolved following magnesium repletion. The authors argue magnesium deficiency is more common than generally recognised and is often missed because serum magnesium poorly reflects total body stores.
Conclusions
Magnesium deficiency should be considered in the differential diagnosis of persistent or severe muscle cramps and pain, since repletion can resolve symptoms in genuinely deficient patients.
Limitations
Case reports only (n=2) with no control group, no blinding and no ability to establish causality or estimate effect size. This is the lowest tier of clinical evidence and does not support magnesium for cramps in people with normal magnesium status - randomised trials in nocturnal leg cramps have generally been negative.
Supplements Studied
Both patients presented with persistent, severe muscle cramps and pain attributable to documented magnesium deficiency, and symptoms resolved following magnesium repletion. The authors argue magnesium deficiency is more common than generally recognised and is often missed because serum magnesium poorly reflects total body stores.
Outcomes Measured
Magnesium deficiency is strongly associated with muscle cramping. Supplementation effectively prevents and treats cramps through its role in neuromuscular transmission.
Related Health Concerns
Study Details
Access Study
This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.