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What is a MAGNESIUM-24HRS URINE?

Magnesium 24-Hour Urine is a test that measures the total amount of magnesium excreted in urine over a 24-hour period. It helps evaluate how the kidneys regulate and eliminate magnesium from the body. The test is needed to investigate abnormal magnesium levels, assess kidney handling of magnesium, and identify possible causes of magnesium deficiency or excess, particularly when blood magnesium results are abnormal or unexplained.

Additional Information

Also known as/ Other names: 24‑Hour Urinary Magnesium, Magnesium, 24‑Hour Urine, Urinary Magnesium Excretion Test, Magnesium (Urine), Timed Collection, Urine Magnesium Quantitative Test, Urinary Mg (24h)
Parameters: 1
Recommended for: M/F/Others
Sample Type: 24 Hrs. Urine
Patient Preparation: No prior preparation is needed
Reports: Same Day

FAQs

What is magnesium?

Magnesium is an essential mineral involved in normal muscle and nerve function, heart rhythm, bone health, and numerous biochemical reactions throughout the body.

What does a high urine magnesium level mean?

Increased urinary magnesium may indicate excessive kidney magnesium loss, which can occur with certain medications, kidney disorders, or metabolic conditions.

What does a low urine magnesium level mean?

Low urinary magnesium may indicate that the kidneys are conserving magnesium, which can occur when the body's magnesium stores are low.

Can kidney problems affect urine magnesium?

Yes. Kidney function plays an important role in magnesium balance. Certain kidney disorders can alter magnesium excretion and lead to abnormal urine results.

Why is a 24-hour collection used instead of a single urine sample?

Magnesium excretion can vary throughout the day. A complete 24-hour collection provides an estimate of total daily magnesium loss and can improve assessment of renal magnesium handling.

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