Urea nitrogen - urine

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Female urinary tract

Male urinary tract

UUN; Urine urea nitrogen

Normal values range from 6 to 17 gm/24 hours or (60 to 90 mg/dl). Normal value ranges may vary slightly among different laboratories.

Note: gm/24 hours = grams per 24 hours; mg/dl = milligrams per deciliter

Low levels usually indicate:

• Malnutrition (inadequate protein in diet 
• Kidney dysfunction
• Increased reabsorption

High levels usually indicate:

• Excessive protein intake
• Increased protein breakdown in the body

Review Date: 02/03/2006
Reviewed By: Charles Silberberg, DO, Private Practice specializing in Nephrology, Affiliated with New York Medical College, Division of Nephrology, Valhalla, NY. Review provided by VeriMed Healthcare Network.