Magnesium deficiency can reduce exercise performance and contribute to muscle cramps, but sub-optimal intake does not appear to be a problem among most groups of athletes.1, 2 Controlled trials suggest that magnesium supplementation might improve some aspects of physiology important to sports performance in some athletes,3, 4 but controlled and double-blind trials focusing on performance benefits of 212 to 500 mg per day of magnesium have been inconsistent.5, 6, 7, 8, 9, 10 It is possible that magnesium supplementation benefits only those who are deficient or who are not highly trained athletes. 11, 12
Comments in this section are limited to effects from taking oral magnesium. Side effects from intravenous use of magnesium are not discussed.
Taking too much magnesium often leads to diarrhea. For some people this can happen with amounts as low as 350–500 mg per day. More serious problems can develop with excessive magnesium intake from magnesium-containing laxatives. However, the amounts of magnesium found in nutritional supplements are unlikely to cause such problems. People with kidney disease should not take magnesium supplements without consulting a doctor.
Certain medicines interact with this supplement.
|Replenish Depleted Nutrients|
|Reduce Side Effects|
|Potential Negative Interaction|
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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2014.