Magnesium is a vital metal for all living things and, according to researchers, magnesium deficiency leads to anxiety and depression. However, the prevailing expert opinion is that normal nutritional intake provides sufficient magnesium.

Magnesium in pure form is a soft and malleable metal not suited to high-stress applications such as a construction material. However, an alloy of magnesium and aluminium or zinc has increased strength.

Magnesium is used as a lightweight alloy in the manufacture of sports cars and racing bicycles where weight is of crucial importance. Magnesium is also used in pyrotechnics, fireworks and distress-signal rockets, as well as in mobile phones and laptop computers.