Depression and magnesium deficiency.

The psychiatric symptoms of magnesium deficiency are unspecific, ranging from apathy to psychosis, and may be attributed to other disease processes associated with poor intake, defect absorption, or excretion of magnesium. Serum magnesium should be determined when there are symptoms consistent with magnesium deficiency and/or in conditions which can lead to a deficiency, e.g., malabsorption, malnutrition, alcoholism and diuretic treatment. A low serum value suggests magnesium deficiency, but the diagnosis is reinforced with analyses of magnesium in the urine and a loading test with magnesium. Magnesium can be given orally or intramuscular/intravenously.