<unk>  is an electrolyte disturbance in which there is a low level of<unk>  in the body. It can result in multiple symptoms. Symptoms include tremor, poor coordination, muscle spasms, loss of appetite, personality changes, and nystagmus. Complications may include seizures or cardiac arrest such as from torsade de pointes. Those with low<unk>  often have low potassium. Causes include low dietary intake, alcoholism, diarrhea, increased urinary loss, poor absorption from the intestines, and diabetes mellitus. A number of medications may also cause low<unk> , including proton pump inhibitors (PPIs) and furosemide. The diagnosis is typically based on finding low blood<unk>  levels (hypomagnesemia). Normal<unk>  levels are between 0.6 and 1.1 mmol/L (1.46–2.68 mg/dL) with levels less than 0.6 mmol/L (1.46 mg/dL) defining hypomagnesemia. Specific electrocardiogram (ECG) changes may be seen. Treatment is with<unk>  either by mouth or intravenously. For those with severe symptoms, intravenous<unk>  sulfate may be used. Associated low potassium or low calcium should also be treated. The condition is relatively common among people in hospitals.
Magnesium deficiency
Fluorine deficiency
Boron deficiency 
Fluoride toxicity
Selenium deficiency
Thiamine deficiency
Copper deficiency
Vitamin D toxicity