magnesium test is used to measure the amount of magnesium in your blood or Urine. Magnesium is a metallic element mainly found in the bones and is essential to life. Abnormal magnesium levels can occur in conditions that affect the functioning of your kidneys or intestines.

calcium test measures the amount of calcium in your blood or Urine. Too much or too little calcium in your blood or urine may be a sign of a wide range of medical conditions, such as bone disease, thyroid disease, parathyroid disorders, kidney disease, and other conditions.

Phosphorus is a mineral the body needs to build strong bones and teeth. It is also important for nerve signaling and muscle contraction. This test is ordered to see how much phosphorus is in your blood or urine. Kidney, liver, and certain bone diseases can cause abnormal phosphorus levels.