Some disorders related to a low BUN level in the blood are pregnancy and acromegaly. If kidneys do not work properly urea remains in the bloodstream and its concentration in the blood will be abnormally higher.Ī BUN level below the normal range may be a sign of a low-protein diet or a liver disorder (the liver is not doing a proper protein metabolism). Kidney disorders ( kidney failure, nephropathies, etc.).High protein catabolism (due to an excessive consumption of proteins, etc.).

A decrease in the plasma volume due to dehydration or upper GI (gastrointestinal) bleeding.

Urea level in the blood is directly related to nutrition, protein metabolism/catabolism and renal functionality.Ī high level of BUN in the blood may be due to: Urea is a marker for kidneys and liver activity. Maximum values increase with the age and are higher in elderly people. It forms in your liver and travels through your blood to your kidneys, which then filter it out of your blood. It develops when your body breaks down the protein in the foods you eat.

Age is an important factor to normal ranges. Overview What is a blood urea nitrogen test A blood urea nitrogen (BUN) test measures the amount of urea nitrogen in your blood.

If your test is expressed in urea you must convert the values from urea to BUN or the information given will not be specific for your case. Warning: In this page we talk about BUN levels.

It important to know if the values measured are the BUN levels used in the US and other countries or instead the values measured are the total urea used in Europe and around the world.

There are some circumstances to take into account about BUN normal ranges in the blood:

Your doctor will study the results along with your medical record, screenings, physical condition, symptoms and any other relevant information about your situation. There may be also slight differences in the normal levels according to age, gender, race or ethnic origin, geographic region, diet, type of sample and other relevant status. These ranges depend on the makeup of the local population, the technologies used and the accuracy of the measurement. Each laboratory must establish its own normal ranges for BUN in the blood.

Urea nitrogen bun normal range