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Magnesium

From WikiSM

Alternative Names

  • Magnesium
  • Magnesium Supplement
  • Magnesium Mineral Supplement
  • Magnesium Citrate
  • Magnesium Glycinate
  • Magnesium Oxide
  • Magnesium Chloride
  • Magnesium Sulfate
  • Oral Magnesium
  • Magnesium Replacement Therapy

Background

  • This page covers the supplement Magnesium in all its formulations

History

  • Magnesium compounds have been used medicinally for centuries
  • “Epsom salt” (magnesium sulfate) was first identified in the 17th century in Epsom, England[1]

Introduction

Magnesium Supplement

Magnesium and Diet. Main sources of magnesium, magnesium supplements, and factors that increase or decrease magnesium bioavailability[2]
Primary dietary sources of magnesium and its pleiotropic actions, focusing on skeletal muscle health.[3]

Magnesium Supplement

Top 5 benefits of magnesium

Magnesium Supplement

General

  • Widely used OTC supplement for deficiency, cramps, sleep, migraines, constipation
  • Common in multivitamins and electrolyte products
  • Typical dose: 200–400 mg elemental daily
  • Absorption varies by formulation (bioavailability differences)

Mechanism

  • Forms Mg-ATP → essential for cellular energy
  • Calcium antagonism → reduces neuronal excitability
  • NMDA receptor blockade → calming / neuroprotective effects
  • Supports muscle relaxation and cardiac conduction

Formulations

  • Magnesium Citrate: well absorbed, laxative effect
  • Magnesium Glycinate: well tolerated, calming
  • Magnesium Oxide: high elemental, poor absorption
  • Others: chloride, sulfate, malate, threonate

Controversy

  • Bioavailability varies significantly by form
  • Serum levels unreliable for total body magnesium
  • Evidence mixed for sleep, anxiety, performance claims
  • Topical absorption unclear

Athletic Performance Benefits

Strength & Power Performance[1]

  • Supports muscle contraction and force production
  • May improve strength in magnesium-deficient individuals

Endurance & Energy Metabolism[4]

  • Enhances ATP production and energy efficiency
  • May improve VO₂ max and exercise capacity in deficient states

Recovery & Muscle Function[5]

  • Reduces neuromuscular excitability and muscle cramps
  • Supports recovery by improving glucose utilization and reducing fatigue

Neuromuscular Performance

  • Regulates calcium channels → improves muscle relaxation and coordination
  • Stabilizes nerve conduction and muscle firing

Sleep & Recovery Optimization[6]

  • Improves sleep quality → enhances recovery and performance
  • Supports parasympathetic (calming) activity

Inflammation & Oxidative Stress

  • May reduce exercise-induced inflammation
  • Supports antioxidant defense systems

Other Health Benefits

Cardiovascular Health[1]

  • Helps regulate blood pressure via vascular smooth muscle relaxation
  • Supports normal cardiac rhythm and conduction
  • Associated with reduced risk of hypertension and cardiovascular disease

Neurologic & Mental Health[7]

  • Modulates NMDA receptors → reduces excitatory signaling
  • May improve symptoms of anxiety and depression
  • Supports cognitive function and neuroprotection

Sleep Regulation[6]

  • Enhances parasympathetic (relaxation) activity
  • May improve sleep quality and sleep latency
  • Supports regulation of melatonin and circadian rhythm

Bone Health[8]

  • Contributes to bone mineral density and structure
  • Supports calcium and vitamin D metabolism
  • Low magnesium linked to increased osteoporosis risk

Glucose Metabolism & Diabetes

  • Improves insulin sensitivity
  • Supports glucose uptake and metabolism
  • Associated with reduced risk of type 2 diabetes

Gastrointestinal Function

  • Acts as an osmotic laxative (especially citrate, oxide)
  • Draws water into intestines → promotes bowel movements
  • Commonly used for constipation relief

Electrolyte Balance

  • Regulates potassium and calcium homeostasis
  • Supports neuromuscular and cardiac stability
  • Helps maintain overall electrolyte balance

Migraine Prevention

  • May reduce frequency and severity of migraines
  • Thought to stabilize neuronal excitability
  • Used as a preventive therapy in some patients

Anti-Inflammatory & Antioxidant Effects

  • May reduce systemic inflammation markers
  • Supports antioxidant enzyme activity
  • Low magnesium associated with chronic inflammatory states

Dosing

  • Typical supplementation: 200–400 mg elemental magnesium daily (varies by indication and formulation)
  • Higher doses (e.g., 400–600 mg/day) may be used for migraines or deficiency under supervision
  • Dose often split to improve absorption and reduce GI side effects

Safety Profile

  • Generally safe and well tolerated in healthy individuals at recommended doses
  • Renal function is key → impaired clearance increases toxicity risk
  • Upper intake level (supplemental): ~350 mg/day (higher doses used clinically with monitoring)

Adverse Effects

  • Diarrhea and GI upset (most common, dose-dependent)
  • Nausea and abdominal cramping
  • Severe toxicity (rare): hypotension, arrhythmias, CNS depression (typically in renal failure)

Pharmacokinetics

  • Absorbed primarily in the small intestine (passive + active transport)[9]
  • Bioavailability varies by formulation (organic salts > inorganic)
  • Excreted mainly by the kidneys, with tight regulation of serum levels

Interactions

  • Reduces absorption of certain medications (e.g., tetracyclines, fluoroquinolones)
  • May interact with diuretics (increase or decrease magnesium levels depending on type)
  • Proton pump inhibitors (PPIs) associated with chronic magnesium depletion

WADA Considerations

  • Magnesium is not prohibited by WADA and is permitted for use in athletes[10]

See Also

References

  1. ↑ 1.0 1.1 1.2 Gröber U, Schmidt J, Kisters K. Magnesium in Prevention and Therapy. Nutrients. 2015;7(9):8199–8226.
  2. ↑ Fiorentini, Diana, et al. "Magnesium: biochemistry, nutrition, detection, and social impact of diseases linked to its deficiency." Nutrients 13.4 (2021): 1136.
  3. ↑ Liguori, Sara, et al. "Role of magnesium in skeletal muscle health and neuromuscular diseases: a scoping review." International journal of molecular sciences 25.20 (2024): 11220.
  4. ↑ Cinar, V., et al. “The Effects of Magnesium Supplementation on Performance of Athletes.” Biological Trace Element Research, vol. 140, no. 1, 2011, pp. 18–23.
  5. ↑ Nielsen, Forrest H., and Milne B. Lukaski. “Update on the Relationship Between Magnesium and Exercise.” Magnesium Research, vol. 19, no. 3, 2006, pp. 180–189.
  6. ↑ 6.0 6.1 Abbasi, B., et al. “The Effect of Magnesium Supplementation on Primary Insomnia in Elderly.” Journal of Research in Medical Sciences, vol. 17, no. 12, 2012, pp. 1161–1169.
  7. ↑ Volpe, Stella L. “Magnesium in Disease Prevention and Overall Health.” Advances in Nutrition, vol. 4, no. 3, 2013, pp. 378S–383S.
  8. ↑ de Baaij, Jeroen H. F., et al. “Magnesium in Man: Implications for Health and Disease.” Physiological Reviews, vol. 95, no. 1, 2015, pp. 1–46.
  9. ↑ Schuchardt, Jan P., and Andreas Hahn. “Intestinal Absorption and Factors Influencing Bioavailability of Magnesium—An Update.” Current Nutrition & Food Science, vol. 13, no. 4, 2017, pp. 260–278.
  10. ↑ World Anti-Doping Agency. The World Anti-Doping Code: The 2025 Prohibited List. WADA, 2025.
Created by:
John Kiel on 22 March 2026 21:25:03
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Last edited:
22 March 2026 21:58:26
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