Magnesium deficiency can be caused by an insufficient intake of magnesium or by an increased loss. Too much exercise or stress can be a cause of magnesium deficiency, and it can lead to adverse health effects. There are no clear symptoms of magnesium deficiency, but the following are the main complaints (3):
increased nervousness and lack of concentration
Stomach and intestinal problems or diarrhoea
Sleep disturbances
Dizziness
Tiredness
Heart pain