General Information About the Test
Test Process and Preparation
A high amount of urea in the blood generally indicates that the kidneys are unable to filter properly (kidney failure). However, it can also rise temporarily in cases of heart failure, severe fluid loss (dehydration), urinary tract obstructions, or gastrointestinal bleeding.
Yes. Even in healthy individuals who follow diets very high in meat and protein (carnivore style), the amount of urea produced in the blood will increase, so the values can be high. In low-protein diets or in cases of liver damage, urea falls below normal.
Although a strict fast is not required for the urea test alone, because this test is always requested along with blood sugar and other kidney/liver functions (biochemistry panel), it is generally performed after an 8-10 hour fast in the morning.
The information on this page is for informational purposes only. The results of medical tests must be evaluated by specialist physicians.
