Understanding Blood Urea Normal Range, Values & Tests

Written by Hexahealth Care Team, last updated on 12 March 2024
Understanding Blood Urea Normal Range, Values & Tests

Have you ever considered why your doctor orders blood tests during routine check-ups? The blood urea level is an important parameter in these tests. The blood urea normal range is vital for assessing how well your kidneys function and any underlying health conditions. Blood urea levels are measured as part of standard blood tests performed during routine check-ups.

In this article, we will explore the blood urea normal range in mg/dL for both males and females, the factors that can affect these levels, and the importance of maintaining normal blood urea levels for optimal health.

What is Blood Urea?

Blood urea refers to the concentration of urea, a waste product produced when proteins break down in the bloodstream. It is a frequently measured parameter in clinical settings to evaluate the overall health and function of the kidneys. The kidneys remove urea from the blood after it is created in the liver as a byproduct of protein breakdown.

When it comes to getting a urea test normal range, it is important to understand the normal range and what it means for your health.

Blood urea levels offer important information about kidney function and can help with the diagnosis and monitoring of a number of medical disorders. If your blood urea levels fall outside the normal range, it may indicate a problem with your kidneys or other health conditions that must be addressed.

  1. High blood urea levels may indicate a kidney problem, such as decreased blood flow or kidney disease.
  2. Low levels may indicate liver disease or malnutrition. 

Abnormal blood urea levels can also be closely connected with other health problems such as heart failure, dehydration, or muscle breakdown. 

As a result, routine blood urea normal range monitoring is critical for maintaining optimal health and avoiding potential health complications. You should work closely with your healthcare provider to understand your test results and take appropriate measures to maintain a healthy blood urea normal value.

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Blood Urea Normal Range in Male and Female

The normal range of blood urea levels is measured in mg/dL, which is milligrams per decilitre. So, what is the normal range of blood urea? The blood urea nitrogen normal range for adults is 6 to 24 mg/dL (2.1 to 8.5 mmol/L). However, this normal range can vary slightly depending on age, gender, and health status.

Furthermore, the results can vary depending on the lab performing the test:

  1. The blood urea normal range in females is between 6 and 21 mg/dL.
  2. The blood urea normal range for males is between 8 and 24 mg/dL. 

Urea Creatinine Normal Range

The Urea Creatinine Ratio (UCR) is a test that measures the ratio of urea to creatinine in the blood, which can provide valuable information about kidney function. 

  1. The urea creatinine normal range typically falls between 0.59 mg/dl to 1.35 mg/dl.
    1. For adult men, 0.74 to 1.35 mg/dL (65.4 to 119.3 micromoles/L)
    2. For adult women, 0.59 to 1.04 mg/dL (52.2 to 91.9 micromoles/L)
  2. A UCR that falls outside of the normal range may indicate a problem with the kidneys, such as decreased blood flow, dehydration, or kidney disease.
  3. An abnormal UCR can also provide insight into other health conditions, such as liver disease, heart failure, or muscle breakdown. 

One must know that a single abnormal UCR result does not necessarily indicate a problem. Certain medications, diet, and exercise can also affect the UCR.

Therefore, working closely with your healthcare provider to understand your UCR results and take appropriate measures to address any potential health concerns is crucial. Regular monitoring of UCR can help catch early signs of kidney problems and other related health conditions, allowing for timely intervention and treatment.

Factors Affecting Blood Urea Levels

Improper functioning of the kidneys can cause an increase in urea levels. Many medical and lifestyle factors can significantly impact the proper functioning of the kidneys and boost blood urea levels. The following factors affect the blood urea normal range:

  1. Diet: Urea is formed in the liver as a by-product of protein metabolism. Therefore, a high-protein diet can cause an increase in blood urea levels. On the other hand, a low-protein diet can cause a decrease in blood urea's normal value. So, it is essential to maintain a balanced diet to keep the blood urea levels in check.
  2. Kidney Function: The kidneys' primary function is waste removal from the blood, including urea. In case of improper functioning of the kidneys, the blood urea levels can increase. Kidney disease, dehydration, or other kidney-related problems can cause a rise in blood urea levels.
  3. Liver Function: The liver is responsible for producing urea. Therefore, any liver disease or damage to the liver can cause an increase in blood urea levels.
  4. Age: Blood urea levels can vary with age. Older people may have higher blood urea levels due to the natural ageing process.
  5. Gender: Blood urea levels can also vary with gender. Males generally have higher blood urea levels than females.
  6. Medications: Some medications, such as antibiotics, diuretics, and chemotherapy drugs, can increase blood urea levels. Always consult a doctor before taking any medicines. This is essential for those who are suffering from kidney or liver problems.
  7. Exercise: Vigorous exercise can cause an increase in blood urea levels normal range due to muscle breakdown. However, this increase is usually temporary and does not cause any harm to the body.

Medications and Supplements Affecting Blood Urea Levels

Blood urea levels also do get affected due to medications and their mechanism. Certain medications can increase blood urea levels, affect the balance of electrolytes in the body, and lead to kidney damage. Some certain supplements and drugs can decrease blood urea levels and improve the function of the kidneys. 

Several drugs and supplements can have an impact on blood urea levels. For instance:

  1. Antibiotics: Antibiotics can cause an increase in blood urea levels by disrupting the balance of bacteria in the gut, leading to increased protein breakdown. 
  2. Diuretics: Diuretics, commonly used to treat high blood pressure and oedema, can also affect blood urea levels by increasing urine output and reducing the kidney's ability to concentrate urine.
  3. Steroids can contribute to high blood urea levels by increasing protein synthesis in the body. 
  4. Nonsteroidal Anti-Inflammatory Drugs (NSAIDs), such as aspirin and ibuprofen, can also elevate blood urea levels by interfering with kidney function. 

A person must consult a healthcare professional before taking any medications or supplements affecting blood urea normal range.

  1. Herbal supplements: Some herbal supplements like St. John's Wort, Echinacea, and Saw Palmetto can impact blood urea levels.

Therefore, informing your doctor about your supplements is crucial, as they can interact with medications and affect blood urea levels. Keeping track of your medication and supplement intake and monitoring blood urea levels can help prevent adverse effects and ensure that you're taking the best care of your health.

Measures to Maintain Urea Normal Range

One of the primary ways to maintain blood urea normal range is by making simple lifestyle changes. By making simple lifestyle changes and monitoring blood urea's normal value, you can take steps to maintain your overall health. The following are lifestyle changes that can significantly help. These are:

  1. Regular Exercises: Regular exercise is sure to be highly beneficial for the kidneys and a person's overall health and well-being.
    Activity regulates body weight, maintains blood pressure, and improves cardiovascular health. The regulation of all these systems boosts the excellent health of the kidneys.
  2. Treating Underlying Health Conditions: Those suffering from other health issues, such as diabetes, hypertension, etc., are at an increased risk of boosting their blood urea's normal range. They should use medication, lifestyle changes, and other medical help to ensure these problems stay in check and do not harm the kidneys.
  3. Complete the Dosage of Prescribed Medication: The prescribed medication should be taken regularly and on time, and no alterations should be made without the knowledge of the health provider, as medications do also alter the blood urea's normal range.
  4. Regular Blood Tests: To ensure that blood urea's normal value, it is recommended that the patient with risk factors for kidney disease or other health conditions get their blood tested at least once a year as part of routine health screenings.
    The frequency of these tests can vary depending on factors such as age, overall health status, and medical history. 
  5. Quit Smoking and Alcohol Consumption: Excessive alcohol consumption and smoking have been known to significantly affect the kidney and their smooth functioning.
    Smoking should be stopped immediately for those with kidney problems, and there should be a considerable check on alcohol consumption.

Dietary Tips to Maintain Blood Urea Normal Value

In general, a certain amount of urea is already present in the blood. In cases where people do not watch their diets, the urea levels can go higher considerably.

Whereas if a person follows a healthy and well-balanced diet, there are good chances that normal blood urea levels can be maintained. Some essential dietary tips for maintaining normal blood urea levels are:

  1. Reduction of Protein Intake: Since urea is a byproduct of protein metabolism, reducing protein intake is essential to match the blood urea's normal range. Reducing the intake of foods rich in proteins, such as fish, meat, eggs, dairy products, etc., is strictly recommended.
  2. Fluid Intake: Drinking plenty of fluids throughout the day is one of the best and most effective ways to flush out all the urea from the body. Unless advised otherwise by the healthcare provider, one must consume 8 to 10 glasses of water and other beneficial fluids daily.
  3. Avoid High Sodium Foods: Consuming excessive sodium can imbalance the electrolytes and cause dehydration. To maintain blood urea levels normal, one must make eating fresh fruits and vegetables an essential part of their diet and avoid packed and processed foods.
  4. Balanced Potassium Intake: Anyone with a kidney problem is advised to control their potassium intake. One must consult their dietician regarding the amount of protein they can take.
  5. Avoid Processed Food: Consumption of processed foods increases the workload for the kidneys resulting in disturbed blood urea normal range. Choosing whole fresh foods over processed food is sure to be highly beneficial.

When to Consult a Doctor?

You must always consult a doctor or a health care provider if you can feel unwanted changes in your body. If your body shows the following symptoms, then it is high time you consult a doctor and get your blood urea tests done. These symptoms include:

  1. Kidney-Related Symptoms: These symptoms include frequent urination, passing blood in urine, dark and foamy urine, swelling in hands and legs, fatigue, weight loss, etc.
  2. Liver-Related Symptoms: If a person is suffering from conditions like dark urine, pale stools, pain in the abdomen, changes in appetite and digestion, weight loss, swelling, etc., it's time for them to consult a doctor.
  3. Kidney or Liver Diseases: When a person has been suffering from these ailments for a long time, it is essential for them to consult their doctors regularly for the line of treatment and to check the effectiveness of the medication.
  4. Family History of Kidney or Liver Disease: If a person has a family history of kidney or liver disease, it is advisable to consult the doctor as soon as possible.


Monitoring blood urea levels is essential for everyone, not just those with kidney disease because high urea levels in the blood can lead to various health complications. Serum urea's normal range is essential for overall health and well-being.

Through lifestyle changes such as a balanced diet, hydration, and regular exercise, individuals can take steps to keep their blood urea levels within a healthy range.

However, If you or your loved one has any further doubts about blood urea normal range, contact HexaHealth experts. HexaHealth is a one-stop destination for all your health-related problems. From connecting you with the best doctors and hospitals to free consultations, we are here to do everything for you. Contact us today to learn more about blood urea normal range in mg dl. 

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Frequently Asked Questions

What is the blood urea normal range in males and females?

The blood urea normal range varies slightly depending on age, gender, and other factors. The normal range of blood urea is:

  1. For adult males is 8-24 mg/dL 
  2. For adult females is 6-21 mg/dL.

What is the normal range of blood urea in adults?

The normal blood urea range for adults is between 6-24 mg/dL. However, it can vary depending on gender, age, and other factors.

What is urea creatinine normal range?

The urea creatinine normal range also varies depending on age and gender. The urea creatinine normal range, i.e., UCR, typically falls between 0.59 mg/dl to 1.35 mg/dl.

  1. For adult men, 0.74 to 1.35 mg/dL (65.4 to 119.3 micromoles/L)
  2. For adult women, 0.59 to 1.04 mg/dL (52.2 to 91.9 micromoles/L)

What does it mean if blood urea levels are higher than the normal range?

If blood urea levels are higher than the normal range, it may indicate

  1. Kidney dysfunction or disease, 
  2. Dehydration, 
  3. Heart failure, 
  4. Other medical conditions. 

A healthcare professional should be consulted for further evaluation and treatment.

What is the blood urea normal range in mg/dL in Children?

The blood urea normal range in children varies depending on age and the laboratory. The blood urea normal range in mg/dl among children is between 7-20 mg/dl.  

Can low blood urea levels indicate any health issues?

Low blood urea levels may indicate 

  1. Malnutrition, 
  2. Liver disease, 
  3. Other medical conditions. 

For further evaluation and treatment, you should consult a healthcare professional.

What factors can affect blood urea levels in males and females?

Factors that can affect blood urea levels include:

  1. Kidney function
  2. Dehydration
  3. Liver function
  4. Protein intake 
  5. Medications and other medical conditions

How is blood urea level tested and measured?

Blood urea level normal range is measured through a blood test. A doctor or nurse will draw blood from a vein in the arm and be sent to a laboratory for analysis.

Are there any lifestyle changes that can help maintain normal blood urea levels?

Lifestyle changes that can help maintain normal blood urea levels include 

  1. Staying hydrated
  2. Eating a balanced diet
  3. Avoiding excessive protein intake
  4. Exercising regularly

What health conditions can affect blood urea levels?

Health conditions that can affect blood urea levels include:

  1. Kidney disease
  2. Liver disease
  3. Heart failure
  4. Dehydration and malnutrition

Can medications or supplements affect blood urea levels?

Yes, certain medications and supplements can affect blood urea levels. One must consult a healthcare professional before taking new medications or supplements.

How often should blood urea levels be checked for maintaining overall health?

The frequency of blood urea level testing depends on factors such as gender, age, and medical history. A healthcare professional can advise on how often blood urea levels should be checked for maintaining overall health.

What other tests are conducted along with blood urea level tests?

Other tests that may be conducted along with blood urea level tests include:

  1. Creatinine Tests 
  2. Electrolyte Tests
  3. Liver Function Tests


All the articles on HexaHealth are supported by verified medically-recognized sources such as; peer-reviewed academic research papers, research institutions, and medical journals. Our medical reviewers also check references of the articles to prioritize accuracy and relevance. Refer to our detailed editorial policy for more information.

  1. Strauss R, Cressman A, Cheung M, Weinerman A, Waldman S, Etchells E, Zahirieh A, Tartaro P, Rezmovitz J, Callum J. Major reductions in unnecessary aspartate aminotransferase and blood urea nitrogen tests with a quality improvement initiative. BMJ Quality & Safety. 2019 Oct 1;28(10):809-16.link
  2. Lyman JL. Blood urea nitrogen and creatinine. Emergency medicine clinics of North America. 1986 May 1;4(2):223-33.link
  3. Abbate M, Zoja C, Remuzzi G. How does proteinuria cause progressive renal damage?. Journal of the American Society of Nephrology. 2006 Nov 1;17(11):2974-84.link

Updated on : 12 March 2024


About Authors

HexaHealth Care Team

HexaHealth Care Team brings you medical content covering many important conditions, procedures falling under different medical specialities. The content published is thoroughly reviewed by our panel of qualified doctors for its accuracy and relevance.

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