Key points
In short: Magnesium is an essential mineral involved in over 300 biochemical reactions, with around 60 per cent of the body's supply stored in bone. It has one of the longest lists of authorised health claims of any nutrient, spanning energy, nervous system, muscle, bone, psychological function and cell division. Leafy greens, nuts, seeds, whole grains and legumes are the main dietary sources.
- Electrolyte balance: magnesium contributes to electrolyte balance. Alongside sodium, potassium and calcium, it is one of the minerals carrying an electric charge that maintain fluid balance and the conditions cells need to function.
- Energy: magnesium contributes to normal energy-yielding metabolism and to a reduction of tiredness and fatigue. It is part of the system converting food into ATP, the molecule cells use for energy.
- Nervous system: magnesium contributes to the normal functioning of the nervous system and to normal psychological function. Nerve cells communicate through electrical signals, and magnesium is involved in how those signals are transmitted.
- Muscle: magnesium contributes to normal muscle function. It works alongside calcium in the contraction and relaxation cycle, in skeletal muscle and in the heart.
- Bone and teeth: magnesium contributes to the maintenance of normal bones and normal teeth. Around 60 per cent of body magnesium is stored in bone, where it works with calcium and vitamin D.
- Growth and repair: magnesium contributes to normal protein synthesis and has a role in the process of cell division.
- Food sources: leafy greens, nuts, seeds, whole grains and legumes.
- Reference intakes: the EU nutrient reference value used for labelling is 375mg a day. The UK reference nutrient intake is 300mg for men and 270mg for women aged 19 to 64.
Magnesium is one of the body’s essential minerals, playing a part in over 300 biochemical reactions. Found in bones, muscles, and cells, it quietly supports everything from energy and focus to strong bones and steady heart rhythms. Yet, despite its importance, many people overlook magnesium in their daily diet. Here’s why it deserves more attention.
Magnesium and Electrolyte Balance – Staying Hydrated at the Cellular Level
Electrolytes are minerals that carry an electric charge and are important for fluid balance in the body. Alongside sodium, potassium, and calcium, magnesium is part of this group. Together, electrolytes help maintain the environment cells need to function properly.
Energy Production – Turning Food Into Fuel
Magnesium plays a role in the process of energy production, where food is converted into usable energy through a molecule called ATP (adenosine triphosphate). This makes it part of the system that keeps cells fuelled for daily activity.
Nervous System Support – Calm, Focus & Relaxation
Communication between nerve cells depends on electrical signals. Magnesium is involved in how these signals are transmitted, contributing to the flow of information within the nervous system. Because of this, it is often discussed in relation to relaxation, focus, and overall balance.
Muscle Function – Movement and Heart Health
Magnesium contributes to the way muscles contract and relax. It works closely with calcium in this process, ensuring that muscle movement is controlled and balanced. This applies not only to skeletal muscles but also to the heart, which is itself a muscle.
Bones and Teeth – Strong Structure for Life
Around 60% of the body’s magnesium is stored in the bones, where it works together with calcium and vitamin D. It plays a part in maintaining bone structure and supporting overall strength and integrity.
Cell Division and Protein Synthesis – Repair and Growth
Magnesium is involved in fundamental processes such as protein building and cell division. These tasks are essential for growth, repair, and maintaining the body’s tissues over time.
Hormonal and Gut Health – Balance From Within
Magnesium is also linked with hormonal balance and gut function. It supports many enzymatic reactions that influence metabolism, while in the digestive system it contributes to the environment that helps process food and nutrients.
Conclusion: Supporting Your Magnesium Needs
Magnesium is a versatile mineral that underpins many aspects of daily health - from energy and muscle function to bone strength and stress balance. To maintain healthy levels, include magnesium-rich foods like leafy greens, nuts, seeds, whole grains, and legumes in your diet. And if you struggle to meet your daily intake through diet alone, a high-quality magnesium supplement can provide added reassurance.
