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Urea (urea nitrogen) in urine
Medical expert of the article
Last reviewed: 04.07.2025
Urea excretion in urine is proportional to the protein content of the diet and the rate of metabolism of endogenous proteins. Urea excreted in urine accounts for approximately 90% of the nitrogen metabolites excreted from the body. In adults in a state of nitrogen equilibrium, the excretion of 500 mmol urea (or 14 g urea nitrogen) per day corresponds to the consumption of 100 g protein.
Reference values (norm) of urea (urea nitrogen) content in urine
The indicator under study |
Urea content in urine |
|
Mmol/day |
G/day |
|
Urea Urea nitrogen |
430-710 430-710 |
24-40 12-20 |