Magnesium test 

A magnesium test is used to measure the amount of magnesium in your blood.

Abnormal magnesium levels can occur in conditions that affect the functioning of your kidneys or intestines.

A magnesium test may be recommended as part of a series of tests if you have symptoms such as nausea, weakness or cardiac arrhythmia (irregular heartbeat). You may have abnormal levels of magnesium, calcium or potassium in your blood.

Read more about the magnesium test at Lab Tests Online UK.