Urea nitrogen; urine

Alternative names:

urine urea nitrogen; UUN

Normal values:

6 to 17 gm/24-hours
(60 to 90 mg/dl)

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

What abnormal results mean:

Low levels usually indicate:

• malnutrition (inadequate protein in diet)
• kidney dysfunction

High levels usually indicate:

• excessive protein intake