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Magnesium (Mg)

Also known as: Magnesium; Mag
Formal name: Magnesium
Related tests: Calcium, Potassium, Phosphorus, Parathyroid hormone (PTH), Vitamin D

 

  • Why should I do it?

To evaluate the level of magnesium in your blood and to help determine the cause of abnormal calcium and/or potassium levels

 

  • When should I do it?

When you have symptoms such as weakness, irritability, cardiac arrhythmia, nausea, and/or diarrhea that may be due to too much or too little magnesium; when you have abnormal calcium or potassium levels

 

  • What Kind of Sample is Needed?

A blood sample drawn from a vein in your arm

 

  • Test Preparation Needed?

Overnight fasting may be required; follow any instructions that you are given.