Adult men and people assigned male at birth. Adult women and people assigned female at birth. Urea is the primary metabolite derived from dietary protein and tissue protein turnover. A value that isnt in the normal range may still be normal for you. Your doctor will also look at your results based on your age, health, and other factors. Your lab report should show the range that your lab uses for each test. Thus, physicians must not misdiagnose renal dysfunction for observing plasma BUN > 8.0 mmol/L in healthy elderly. Each lab has a different range for whats normal. Normal BUN Level (mg/dL) Children between 1 and 17 years. The normal range of urea nitrogen in blood or serum is 5 to 20 mg/dL or 1.8 to 7.1 mmol urea per liter 14. If your levels are higher than normal, this may be a sign that your kidneys are not working as well as they should. A normal level of urea nitrogen will depend on your age and other health conditions you may have, but usually ranges from 7 to 20. Weight loss surgery: Following weight loss surgery, which reduces the body’s ability to absorb nutrients, albumin levels may be low. A normal blood urea nitrogen level varies according to your age and sex. This process helps keep your BUN level within a normal range.In these cases, albumin levels will be lower than normal. Whipple disease: This rare bacterial infection affects joints and the digestive system, impairing the body’s ability to digest food.Malnutrition: Decreased levels of albumin in the blood may also be signs of malnutrition.Birth control pills: Oral contraceptive pills and some other medications can lower your albumin levels.You can expect your levels return to normal after pregnancy. Pregnancy: Being pregnant may cause you to have low albumin levels.Infection: As your body fights off an infection, you may have low albumin levels.These issues lead to lower levels of albumin. Thyroid disease: A host of diseases can affect the thyroid gland, which can cause immune system problems.Celiac disease: This is an autoimmune disorder in which foods with gluten, such as wheat, barley, or rye, cause white blood cells to attack the lining of the small intestine.Crohn’s disease: A persistent and damaging inflammation of the gastrointestinal tract, Crohn’s disease leads to difficulties with nutrient absorption.It's also seen in liver cirrhosis, a scarring of liver tissue due to chronic hepatitis or excessive alcohol use, and jaundice, a yellowing of eyes and skin. Liver diseases: Lower levels of albumin are also seen in cases of liver diseases such as hepatitis, an inflammation of the liver often due to viral infection. In addition to urine tests, blood tests will likely involve creatinine, glomerular filtration rate, and blood urea nitrogen (BUN). Your healthcare provider will likely want to run other tests before making this diagnosis. Kidney disease can also result in albumin spilling into the urine, known as microalbuminuria. Kidney problems: Impaired kidney function, especially chronic kidney disease (CKD), leads to lower-than-normal levels.
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