Second most abundant intracellular cation. Co-factor for >300 enzymatic reactions. Hypomagnesaemia is a common and often under-recognised cause of refractory hypokalaemia.
| Sex | Age | Range | Notes |
|---|---|---|---|
| All | ≥ 18 yrs | 0.7 – 1 | Adult |
⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.