Why get tested?To evaluate the level of magnesium in your blood and to help determine the cause of abnormal calcium and/or potassium levels
When to get tested?If you have symptoms (such as weakness, irritability, cardiac
arrhythmia, nausea, and/or diarrhea) that may be due to too much or too little magnesium or if you have abnormal
calcium or
potassium levels
Sample required?A blood sample drawn from a vein in your arm