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Magnesium Deficiency and Its Impact on Your Health

Updated: Jan 28

Magnesium is a vital mineral that supports hundreds of functions in the human body. Despite its importance, many people do not get enough magnesium, leading to magnesium deficiency. This deficiency can affect your health in subtle and sometimes serious ways. Understanding magnesium deficiency, its causes, symptoms, and how to address it can help you maintain better overall health.


Close-up view of magnesium-rich foods including nuts, seeds, and leafy greens

What Is Magnesium and Why Is It Important?


Magnesium is a mineral found naturally in many foods and is essential for the body to function properly. It plays a key role in:


  • Supporting muscle and nerve function

  • Regulating blood sugar levels

  • Maintaining normal blood pressure

  • Producing protein, bone, and DNA

  • Supporting energy production and metabolism


The body contains about 25 grams of magnesium, with 50-60% stored in bones and the rest in muscles, soft tissues, and fluids. Because magnesium is involved in over 300 enzymatic reactions, even a small deficiency can disrupt many bodily processes.


Causes of Magnesium Deficiency


Magnesium deficiency can develop for several reasons, including:


  • Inadequate dietary intake: Many people do not consume enough magnesium-rich foods such as nuts, seeds, whole grains, and leafy greens.

  • Poor absorption: Conditions like celiac disease, Crohn’s disease, or chronic diarrhea can reduce magnesium absorption in the intestines.

  • Increased excretion: Certain medications like diuretics, antibiotics, or proton pump inhibitors can cause the body to lose magnesium through urine.

  • Chronic illnesses: Diabetes, alcoholism, and kidney disease can affect magnesium levels.

  • Age: Older adults tend to absorb less magnesium and may have diets low in this mineral.


Understanding these causes helps identify who might be at risk and why magnesium deficiency occurs.


Signs and Symptoms of Magnesium Deficiency


Magnesium deficiency often develops slowly and can be hard to detect early. Symptoms may include:


  • Muscle cramps or spasms

  • Fatigue and weakness

  • Nausea or loss of appetite

  • Abnormal heart rhythms

  • Numbness or tingling sensations

  • Mood changes such as anxiety or irritability

  • Difficulty sleeping


If magnesium levels drop significantly, more serious complications like seizures or coronary spasms can occur. Because symptoms overlap with other conditions, magnesium deficiency often goes unnoticed without proper testing.


How Magnesium Deficiency Affects Your Health


Magnesium deficiency can impact many aspects of health:


Heart Health


Magnesium helps regulate heart rhythm and blood pressure. Low magnesium levels are linked to increased risk of hypertension, arrhythmias, and cardiovascular disease. Research shows that people with low magnesium intake have a higher chance of heart attacks and strokes.


Bone Health


Magnesium contributes to bone formation by influencing calcium metabolism. Deficiency can lead to weaker bones and increase the risk of osteoporosis and fractures, especially in older adults.


Mental Health


Magnesium plays a role in brain function and mood regulation. Studies suggest that low magnesium levels may contribute to depression, anxiety, and migraines. Supplementing magnesium has shown benefits in reducing symptoms in some cases.


Blood Sugar Control


Magnesium helps regulate insulin action and blood sugar levels. Deficiency is common in people with type 2 diabetes and may worsen insulin resistance, making blood sugar harder to control.


How to Test for Magnesium Deficiency


Testing magnesium levels can be tricky because most magnesium is inside cells or bones, not in the blood. Common tests include:


  • Serum magnesium test: Measures magnesium in the blood but may not reflect total body magnesium accurately.

  • Red blood cell magnesium test: Provides a better estimate of magnesium inside cells.

  • 24-hour urine magnesium test: Measures magnesium excretion to assess loss.




Foods High in Magnesium


Eating magnesium-rich foods is the best way to prevent or correct deficiency. Some excellent sources include:


  • Nuts and seeds: Almonds, cashews, pumpkin seeds, sunflower seeds

  • Leafy green vegetables: Spinach, Swiss chard, kale

  • Whole grains: Brown rice, quinoa, oats

  • Legumes: Black beans, chickpeas, lentils

  • Fruits: Banana, avocado

  • Dark chocolate: Contains a good amount of magnesium


Including a variety of these foods in your diet supports healthy magnesium levels.


Magnesium Supplements: What You Should Know


If dietary intake is insufficient or deficiency is diagnosed, supplements may be recommended. Magnesium supplements come in different forms, magnesium citrate or glycinate are better absorbed and cause fewer digestive side effects.


Before starting supplements, it is important to discuss with your Naturopath or doctor about the right dose and form. Excessive magnesium intake from supplements can cause diarrhea, nausea, and in rare cases, serious heart problems.


Lifestyle Tips to Maintain Healthy Magnesium Levels


Besides diet and supplements, consider these tips:


  • Limit alcohol consumption, which can reduce magnesium absorption.

  • Manage stress, as chronic stress may deplete magnesium.

  • Avoid excessive use of diuretics or laxatives unless prescribed.

  • Stay hydrated to support kidney function and mineral balance.



Magnesium deficiency is more common than many realize and can affect your health in many ways. Paying attention to your diet, recognizing symptoms, and seeking testing if needed can help you avoid complications. If you suspect low magnesium, start by adding magnesium-rich foods to your meals and discuss supplementation with your Naturopath or doctor. Taking these steps supports your heart, bones, mood, and overall well-being.


DISCLAIMER:

 

The information provided in this article is for educational and informational purposes only and is not intended as medical advice, diagnosis, or treatment. Always seek the advice of your qualified healthcare provider with any questions you may have regarding a medical condition.


References


DiNicolantonio JJ, O'Keefe JH, Wilson W. Subclinical magnesium deficiency: a principal driver of cardiovascular disease and a public health crisis. Open Heart. 2018 Jan 13;5(1):e000668. doi: 10.1136/openhrt-2017-000668. Erratum in: Open Heart.


Intestinal absorption and factors influencing bioavailability of magnesium-an update. Schuchardt JP, Hahn A. Curr Nutr Food Sci. 2017;13:260–278. doi: 10.2174/1573401313666170427162740. 


Fiorentini D, et al., Magnesium: biochemistry, nutrition, detection, and social impact of diseases linked to its deficiency. Nutrients. 2021;13:2374. doi: 10.3390/nu13041136. 


Kothari M, et al., Comprehensive Review on Understanding Magnesium Disorders: Pathophysiology, Clinical Manifestations, and Management Strategies. Cureus. 2024 Sep 1;16(9):e68385. doi: 10.7759/


Kirkland AE, Sarlo GL, Holton KF., The role of magnesium in neurological disorders. Nutrients. 2018;10:30. doi: 10.3390/nu10060730.


Moretti A., What is the role of magnesium for skeletal muscle cramps? A Cochrane Review summary with commentary. . https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8020016/ J Musculoskelet Neuronal Interact. 2021;21:1–3




 
 
 

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