The smooth functioning of kidney functions is very important for the digestive system. The blood test to understand whether the kidney functions are healthy is called the BUN Blood Test. We have compiled information about the Bun Test for you. Healthy reading!

What is the Bun Test? 

The bun test is defined as a test to analyze how well the kidneys are functioning. This test is also known as "blood urea nitrogen". Urea nitrogen is the waste material produced in the liver when the body breaks down proteins. Healthy kidneys filter this urea nitrogen and help it get rid of it through urine. In case of damage to the kidneys or liver, “BUN” (urea) nitrogen level may increase. Excess urea nitrogen in the blood is a sign of health problems in the kidneys and livers. This value varies according to the age and gender of the patient. In general, the following values ​​are considered normal for the BUN, ie urea value;

– In adult males; 8-24 mg/dL

– In adult women; 6-21 mg/dL

– in children aged 1-17; 7-20 mg/dL

– Adults aged 60 and over have higher normal BUN (urea) levels than adults under 60.

bun test

What is the Bun Test Used for?

Bun test is a blood test application used to analyze kidney function. In some cases, this test may not be enough to make a diagnosis. In such cases, other blood tests such as a creatinine test may also be done. The bun test is used to diagnose the following conditions. These situations are;

Liver damage,

Poor circulation,

Urinary tract diseases,

Congestive heart failure

Gastrointestinal bleeding,

· Not enought feeding,

To understand whether existing diseases are due to the kidneys

· To learn the status of kidney functions,

· The bun test can also be done to determine the route for dialysis treatment. The bun test only measures the amount of urea nitrogen. The bun test is not used to diagnose why the urea nitrogen count is high or low. 

What are the Causes of High Bun Test Value?

This test can show problems with the liver and kidneys. However, this test does not tell the causes of the health problem, so research is needed to understand the cause of the health problem. If your BUN values ​​are high, it may be due to the following reasons;

Heart ailments,

– heart failure

- Heart attack



Bleeding in the digestive system

Dehydration (dehydration)

High protein levels

Kidney diseases

- Kidney failure

– Congestion in the urinary tract

· Stress

· State of being shocked

· Medicines used for some treatments can cause high Bun levels. 

In order to reduce the level of this, first of all, it is necessary to diagnose the diseases that cause the increase of this level. In this case, adequate fluid consumption and a low protein diet program can help decrease Bun values. 

What Are the Symptoms of BUN Height? 

The reason for the high level of bun, that is, the level of urea, may be health problems in the kidneys. BUN (urea), which occurs as a result of the breakdown of protein, accumulates in the blood when the kidneys cannot excrete this urea through urine. The possible symptoms of the height of this level are as follows;

Weakness in the muscles

Extreme weight loss

Loss of appetite

· Irregular sleep

· Headache

Respiratory disorder

· Anemia

· Nausea 


Burning sensation in the mouth and dryness in the mouth

· State of fatigue

Constant hiccuping

· Breath odor

Symptoms such as can occur due to the high level of Bun. You need to consult a physician to determine this clearly and to diagnose and treat any underlying health problems. Your doctor will make the appropriate guidance for you. 

What are the Causes of Low BUN Level?

Low levels of this are not uncommon. In cases such as irregular and insufficient nutrition and insufficient water consumption, low BUN level may be encountered. 

Inability to get as much protein as the body needs

Use of antibiotics and anabolic steroids,

  • Although rare; 

- Liver related diseases

– Problems of the digestive system 

– Diabetes

– Cirrhosis 

– Tuberculosis 

Interventions to the pancreas

– Removal of a part of the pancreas,

– Pancreatic insufficiency 

– Pancreatic cancer

· Liver failure

· Not enought feeding

– Inadequate protein intake


Release of antidiuretic hormone 

Some diseases may be the cause of low BUN level. In order to reveal these reasons, you should consult a doctor and follow the treatment methods that your doctor has determined for you in order to treat these problems.

In addition, in order to regulate the blood values ​​in our body and not to experience vitamin and mineral deficiencies that will endanger our health, with the advice of a doctor, supplementary food and multivitamins It is one of the things we need to do to protect our health.


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