Red blood cell magnesium test

The red blood cell magnesium test measures the concentration of magnesium inside red blood cells. This is thought to be a more reliable test than serum magnesium as very little of the body's magnesium is found in the serum. 99% of total magnesium is found in bone, muscles and non-muscular soft tissue.

Studies

 * 1991, Red blood cell magnesium and chronic fatigue syndrome.
 * 1994, Normal red cell magnesium concentrations and magnesium loading tests in patients with chronic fatigue syndrome.
 * 1997, Magnesium deficit in a sample of the Belgian population presenting with chronic fatigue.