Magnesium is extremely important mineral and quantitatively takes a fourth place in human body. It activates function of more than 300 enzymes. It is responsible for synthesis of proteins, function of muscle and nerves, control of blood glucose and regulation of blood pressure. Under physical and psychological stress body uses large quantities of magnesium and the deficiency results in impairment of several body functions. Many experts agree that magnesium is efficient aid fighting with stress and tension – factors strongly influencing hair loss.