What Is Serum Urea?


During the metabolism of protein in the body, the liver creates ammonia, which is broken down into a by-product called urea. Kidneys filter excess urea into the urine and in sweat, but some goes into the bloodstream as serum urea.

Kidney Problems

Low Serum Urea

  • If a patient presents a low serum urea level, it can indicate trouble with the liver. If the liver is not synthesizing protein, then urea will not be produced.


  • If a patient's serum urea level is higher than normal, it could mean the person is dehydrated. When the body is dehydrated, the kidneys will reabsorb more urea when ADH (antidiuretic hormone) is produced to reduce additional loss of fluids.


  • Diet can also affect serum urea levels. Depending whether a person has a high or low protein diet, it could alter the serum urea level, giving a false indication that there could be a kidney or liver problem.


  • Venous blood can be drawn and tested to determine serum urea levels. A normal serum urea level for adults is between 15 and 50 mg/dl.

Related Searches


  • Photo Credit Image by Flickr.com, courtesy of Andrew Mason Image by Flickr.com, courtesy of hobvias sudoneighm Image by Flickr.com, courtesy of Elin
Promoted By Zergnet



You May Also Like

  • What Blood Tests Need Fasting Preparation?

    Blood tests are done to check for pregnancy, diabetes, cholesterol and vitamin and mineral problems. Most blood tests do not need any...

  • Normal BUN & Creatinine Levels

    Creatinine and BUN tests are performed to measure renal function, filtration and over all organ health. These 2 tests, along with the...

  • Symptoms of Blood Urea

    Blood urea occurs when the kidneys have trouble reabsorbing the urea, which is a waste product from the liver, from the rest...

  • Normal Urea Levels

    A normal urea level is an indicator that protein in the body is being metabolized properly. Too much or too little urea...

  • What Is Glucose Serum?

    Glucose serum is more commonly referred to as blood sugar, and it refers to the concentration of sugar, or glucose, in the...

  • What Is a Urea Test?

    According to Lab Tests Online, urea nitrogen is always present in small amounts in the blood of healthy individuals. Urea is a...

  • What is Urea Nitrogen?

    Urea nitrogen is a natural byproduct of protein consumption. Agriculturalists, physicians, environmentalists and everyday consumers have a vested interest in urea. They...

  • What Are the Treatments for High Urea Nitrogen?

    High urea nitrogen, also known as urea toxicity, develops when the urea added to livestock feed is too great. Urea is a...

  • What Is a Normal Protein Level for a Kidney?

    When kidneys are not functioning properly, protein may escape from the blood into urine and protein levels will not be normal. Blood...

  • Ammonia Levels in Your Body

    Ammonia is a byproduct formed by the breakdown of proteins in the body. The liver converts this ammonia to urea, and your...

  • What Causes Low Co2 Levels?

    Low carbon dioxide (CO2) in the body, or hypocapnia, causes blood to be less acidic. This condition is caused by hyperventilation, or...

  • Diet to Lower Creatinine Levels

    Our kidneys filter byproducts and waste from our blood. To monitor kidney function, doctors measure serum levels of creatinine, which is made...

Related Searches

Check It Out

This Is the Beauty Routine of a Yelp Sales Manager

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!