• How does this test help in the clinical management of kidney function?

The test assists in evaluating how efficiently the kidneys are excreting protein metabolism byproducts.

• What is the typical range for urea excretion in adults on a moderate protein diet?

For adults consuming a moderate amount of protein (70–100 grams per day), the urea excretion typically ranges between 12 and 20 grams over a 24-hour period.

Medical Laboratories

24-Hour Urine Urea Test

Accurately assess your nutritional quality and kidney health. This test measures daily urea excretion to reflect protein intake and metabolic state, helping optimize your dietary and clinical management.

Trusted medical contentUpdated: 04-09-2026Views: 47LHL-2438

About this service

This test measures the amount of urea excreted in urine over a complete 24-hour period. Urea is the main end-product of protein metabolism. This measurement provides an accurate estimate of total protein catabolism and nitrogen balance in the body, which is crucial for nutritional assessment in clinical settings, especially for patients with renal disease or those on specific diets.

Conditions and notices

Fasting is not required

Continue your usual diet unless otherwise directed by your doctor (to assess your usual intake).

Avoid losing any urine during the 24-hour collection period to ensure an accurate sample.

Keep the collection container cool (refrigerated) during and after collection until delivery to the laboratory.

Record any unusual symptoms (such as diarrhea) during collection, as these can affect nitrogen loss through stool.

Frequently Asked Questions

Short answers to the FAQs published with this service.

• Which patient groups is this test particularly useful for?

The test is intended for patients in intensive care, those with acute illnesses to monitor nutrition, individuals with kidney failure to assess dialysis adequacy, and athletes or those on extreme protein diets.

• Is fasting required for the 24-hour urine urea collection?

No, fasting is not required for this test.

• What might high urea levels in the urine indicate?

Elevated levels can indicate a high protein intake or an increase in protein breakdown within the body.

• What do low urea levels in a 24-hour urine sample suggest?

24-Hour Urine Urea Test

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Conditions and notices

Frequently Asked Questions

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