At a Glance
Why Get Tested?
When to Get Tested?
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
Test Preparation Needed?
For a blood sample, overnight fasting may be required; follow any instructions that you are given.