Table 2. The list of available tests for magnesium measurement.
| Available Tests for Magnesium Measurement |
| Total serum Mg2+ |
| 24-hour urinary Mg2+ and fractional excretion of Mg2+ |
| Oral or IV Mg2+ loading test |
| Intracellular Mg2+ measurement in the erythrocytes, hair, muscle, and bone |