![]() Any duplication or distribution of the information contained herein is strictly prohibited. Blood urea nitrogen (BUN) is a medical test that measures the amount of urea nitrogen found in blood.The liver produces urea in the urea cycle as a waste product of the digestion of protein.Normal human adult blood should contain 6 to 20 mg/dL (2.1 to 7.1 mmol/L) of urea nitrogen. Heres how your body typically forms and gets rid of urea nitrogen: Your liver produces. It may also be due to other issues like gastro-intestinal bleeding, cardiac issues. What does high BUN mean Higher levels of BUN refer to kidney issues. Children: 1 to 17 years old: 5.5 - 20 mg/dL Newborns: 3. Adults: 18 to 30 years old: 9 - 20 mg/dl 30 to 40 years old: 9 - 21 mg/dl 40 to 50 years old: 9 - 22 mg/dl 50 to 60 years old: 9 - 25 mg/dl 60 to 70 years old: 9 - 28 mg/dl More than 70 years old: 9 - 32 mg/dl. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. A BUN test measures the amount of urea nitrogen thats in your blood. Anything above or below this range requires medical attention and your healthcare provider may suggest tests to confirm the severity of your case. What is the normal BUN level in the blood BUN normal ranges are age-related. Links to other sites are provided for information only – they do not constitute endorsements of those other sites. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Normal ranges vary depending on the reference range used by the lab, but anywhere between 10-20 mg/dL is considered normal. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. In general, normal BUN levels fall in the following ranges: adult men: 8 to 24 mg/dL adult women: 6 to. This site complies with the HONcode standard for trustworthy health information: verify here. It’s also important to note that each laboratory has different ranges for what’s normal. ![]() ![]() Learn more about A.D.A.M.'s editorial policy editorial process and privacy policy. is among the first to achieve this important distinction for online health information and services. follows rigorous standards of quality and accountability. is accredited by URAC, for Health Content Provider (URAC's accreditation program is an independent audit to verify that A.D.A.M. ![]()
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