Urine Magnesium

Code:
UMG

Sample Type:

24 hour urine (24 hour collection bottle) 

Random urine – plain, no preservative

Ref Ranges/Units:

Adults: 3.0 – 5.0 mmol/24 hour (manufacturer’s range)

Turnaround:

Same Day

Stability:

Acidified in laboratory to pH 1.

Once acidified, stable for:
3 days at 15‑25°C  
3 days at 2‑8°C  
1 year at -20°C 

Special Precautions/Comments:

Additional Information:

Magnesium homeostasis is largely controlled by renal excretion, as well as intake. As such, urine magnesium measurement is usually performed in patients with a low serum magnesium to identify the underlying mechanism.

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