Magnesium - Health Benefits

Magnesium is an essential mineral involved in hundreds of biochemical reactions in the body. It plays a fundamental role in energy production, muscle and nerve function, bone and cardiovascular health, and is indispensable for the normal functioning of the human body.

What is Magnesium?

Magnesium is a vital mineral and an essential nutrient that the body needs for countless physiological functions. It participates in over 300 enzymatic reactions, contributing to energy metabolism, muscle function, nerve transmission, and maintaining bone health.

What are the main food sources of Magnesium?

Magnesium is naturally present in various foods, including:

• Green leafy vegetables (spinach, kale);
• Nuts and seeds (almonds, sunflower seeds);
• Whole grains (brown rice, oats);
• Legumes (beans, chickpeas);
• Some fruits, such as bananas and avocados.

When diet does not provide sufficient amounts, magnesium can also be obtained through food supplements.

What are the health benefits of Magnesium?

Magnesium participates in over 300 biochemical reactions related to muscle and nerve function, energy metabolism, blood pressure regulation, and immune system function.

Among the main studied benefits are:

Bone health

Magnesium contributes to the maintenance of normal bones and participates in the formation of bone structure. Adequate intake may help preserve bone health throughout life.

Cardiovascular health

Magnesium contributes to normal muscle function, including heart muscle, and participates in maintaining normal cardiovascular function.

Sleep quality

Magnesium has been studied for its potential role in muscle relaxation and sleep quality. Some studies suggest benefits in people with a deficiency of this mineral.

Nervous system and psychological well-being

Magnesium contributes to the normal functioning of the nervous system and normal psychological function, potentially playing an important role in periods of increased physical and mental demand.

Glucose metabolism

Magnesium participates in insulin secretion and normal glucose metabolism. Some studies suggest that adequate intake may contribute to better metabolic health.

Muscle function

Magnesium contributes to normal muscle function and has been studied for its possible role in reducing muscle cramps in people with a deficiency of this mineral.

What are the most bioavailable types of magnesium supplementation?

Bioavailability refers to the body's ability to absorb and utilize magnesium.

Among the most bioavailable forms are:

• Magnesium citrate;
• Magnesium bisglycinate;
• Magnesium malate;
• Magnesium L-threonate;
• Magnesium chloride;
• Magnesium orotate.

Absorption may vary between individuals and depend on specific needs and health status. The choice of magnesium form should be adapted to the goals of supplementation.

What is the recommended daily dose of Magnesium?

Daily magnesium requirements vary according to age, sex, and life stage.

For most adults, the recommended daily intake is between 310 mg and 420 mg per day.

It is important to ensure adequate intake through diet or, when necessary, through supplementation.

Why is it difficult to maintain adequate magnesium levels through diet alone?

Although a balanced diet is the main source of magnesium, several factors can make it difficult to obtain adequate amounts solely through diet.

These include:

• Soil depletion: Modern agricultural practices have reduced the magnesium content in many foods.
• Food processing: The refining of cereals removes much of the naturally present magnesium.
• Dietary habits: High consumption of processed foods and reduced intake of vegetables, nuts, and legumes decreases the intake of this mineral.
• Absorption problems: Compounds such as phytates and oxalates can partially reduce intestinal absorption of magnesium.
• Increased needs: Situations of stress, intense physical exercise, diabetes, and some gastrointestinal diseases can increase the body's needs.
• Medications: Some diuretics, antibiotics, and proton pump inhibitors (such as omeprazole, pantoprazole, or lansoprazole) can decrease magnesium levels.

For these reasons, some people may benefit from supplementation, whenever indicated by a healthcare professional.

What are the possible side effects of magnesium supplementation?

Magnesium is generally safe when used at recommended doses.

At high doses, adverse effects may occur, including:

• Diarrhea;
• Nausea;
• Abdominal cramps;
• Gastrointestinal discomfort.

In rare cases, very high doses can cause hypotension, changes in heart rhythm, and electrolyte imbalances.

People with kidney disease should consult a healthcare professional before starting supplementation, as they may have difficulty eliminating excess magnesium.

Magnesium can also interact with some medications, including certain antibiotics, diuretics, and bisphosphonates.

Conclusion

Magnesium is an essential mineral that contributes to the normal functioning of muscles, the nervous system, energy metabolism, bone health, and the body's balance.

Although it is present in various foods, several factors can make it difficult to obtain adequate amounts solely through diet, making supplementation an option in certain situations.

Like any food supplement, magnesium should be used as a complement to a varied and balanced diet and a healthy lifestyle.

The information presented in this article is for informational purposes only and does not replace medical advice. Food supplements should not be used as substitutes for a varied and balanced diet and a healthy lifestyle.

References

Healthline (2024) 10 Evidence-Based Health Benefits of Magnesium. Available at: https://www.healthline.com/nutrition/magnesium-benefits (Accessed: 22 July 2026).

Mayo Clinic (2024) Magnesium supplements: Do they work? Available at: https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/magnesium-supplements/faq-20466270 (Accessed: 22 July 2026).

Veronese, N., Demurtas, J., Pesolillo, G., Celotto, S., Barnini, T., Calusi, G., Caruso, M.G., Notarnicola, M., Reddavide, R., Stubbs, B., Solmi, M., Maggi, S., Vaona, A., Firth, J., Smith, L., Koyanagi, A., Dominguez, L. and Barbagallo, M. (2020) 'Magnesium and health outcomes: an umbrella review of systematic reviews and meta-analyses of observational and intervention studies', European Journal of Nutrition, 59(1), pp. 263–272. doi:10.1007/s00394-019-01905-w.