High urinary urea excretion may be caused by

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High levels of urinary urea excretion may be caused by protein intake in excess of the body's need;excess protein is deaminated and used to provide energy;and the ammonia is converted to urea by the liver and excreted by the kidneys.Kidney failure causes high blood levels of urea because the kidneys are unable to excrete it;urinary urea levels would be low.Phenylketonuria is an inability to break down excess phenylalanine and would have very little effect on urea excretion.Administration of growth hormone would cause anabolism,which would result in greater use of amino acids and less urea excretion.

High Urinary Urea Excretion May Be Caused by