Magnesium, alongside sodium, potassium and calcium, is one of the human body’s most abundant minerals. The vital mineral, which plays a role in over 300 enzymatic reactions within the body, belongs to the alkaline earth metals family. On the periodic table of elements, its atomic number is 12 and its symbol is Mg. Magnesium is found in nature (in the Earth’s crust, on land and in the oceans) and in the human body, where it plays a role in numerous metabolic processes and physiological functions. In our bodies, magnesium is mainly stored inside our cells, bones and teeth (50 per cent of our magnesium reserves), with the remainder found in the muscles, liver, heart and kidneys. Magnesium is essential for the formation of bones and teeth, and for proper nerve and muscle function. Magnesium plays a role in the absorption of vitamin D, in potassium metabolism and, above all, in calcium metabolism. Indeed, one of magnesium’s main roles is to balance calcium absorption by helping the bones to bind it. Please note: Magnesium is neither synthesised by the human body nor stored; therefore, this mineral must be obtained through the diet and, in the event of a magnesium deficiency, via dietary supplements.
Minerals and trace elements: what’s the difference?
Magnesium is not a trace element. Magnesium is one of the major minerals in the body, found in abundance inside it alongside potassium, calcium, phosphorus and sodium. These essential minerals are referred to as mineral salts, mineral compounds or macronutrients. Trace elements, on the other hand, are also minerals but are present in the body in very small quantities. If taken in excess in the form of dietary supplements, certain trace elements can become toxic. Examples of these trace elements include fluorine, iron, copper, manganese, selenium and zinc.
What are magnesium’s chemical properties?
Symbol: Mg
Atomic number: 12
Group: Alkaline earth metals (Group 2 of the periodic table)
Reactivity:
Reacts with hot water (slowly) and with water vapour.
Reacts vigorously with acids, releasing hydrogen.
Burns with a bright white flame in the presence of oxygen to form magnesium oxide (MgO).


















