Doctors order a blood urea nitrogen (BUN) test to measure the amount of urea nitrogen in your blood. It helps them see how well your kidneys are working. A BUN test measures how much blood urea ...

A BUN test measures the level of urea nitrogen in the blood using a standard blood sample. Abnormal BUN levels may indicate problems with liver or kidney functioning. BUN stands for blood urea ...

Creatinine is a breakdown product of muscle metabolism. The main route of creatinine excretion is through the kidneys, where it is filtered by the glomerulus and also secreted by the proximal tubule.

Creatinine is essentially a metabolite of creatinine phosphate, a compound that acts as a source of energy in muscle. Men tend to have higher creatinine levels than women due to their greater skeletal ...