Magnesium: Types, Uses, and Food Sources
Magnesium is an essential mineral involved in normal muscle and nerve function, energy production, bone health and many other processes in the body. It occurs naturally in a wide range of foods and is also available in supplements.
This is general educational information, not medical advice. Speak to a healthcare provider or pharmacist before starting any supplement, especially if you take other medications.
What magnesium does in the body
Magnesium helps enzymes carry out hundreds of normal chemical reactions. It contributes to the normal function of muscles and nerves, helps the body make protein and supports the structure of bones and DNA.
A single symptom cannot confirm that someone needs more magnesium. Tiredness, cramps and other common experiences can have many causes, so persistent or concerning symptoms should be discussed with a healthcare professional.
Food sources of magnesium
A varied diet can provide magnesium from many everyday foods, including:
- Beans, lentils and other pulses
- Nuts and seeds
- Wholegrain breads, oats and brown rice
- Green leafy vegetables such as spinach
- Some fortified breakfast cereals
- Milk, yoghurt and some other dairy foods
Food sources also provide fibre, protein and other nutrients. Building meals around a range of minimally processed foods is generally more useful than focusing on one mineral in isolation.
Common forms found in supplements
Magnesium supplements are sold in several forms, including citrate, chloride, oxide, lactate and aspartate. These forms can differ in how they are absorbed and in how products are intended to be used. A product name alone does not show whether it is appropriate for a particular person.
Magnesium may also appear in some medicines, including certain products used for indigestion or constipation. This is one reason to show a pharmacist everything you take, including over-the-counter products and supplements.
When professional guidance matters
Speak to a doctor or pharmacist before using a magnesium supplement if you have a health condition, are pregnant or breastfeeding, take prescribed or over-the-counter medicines, or are considering a product for a child. Do not use a supplement to replace assessment or treatment for a health concern.
A food-first approach
Simple ways to include magnesium-rich foods include adding beans to soups or salads, choosing wholegrains, using nuts or seeds as part of meals, and eating a variety of vegetables. Individual dietary needs differ, and a registered dietitian can help when food choices are limited by allergies, digestive conditions or other medical needs.
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