Low BUN level in the blood - MrLabTest A low BUN (blood urea nitrogen) level in the blood is called hypoazotemia and it is not common It can be a consequence of malnutrition with a low-protein diet and a high water intake Hypoazotemia can be a sign of liver disorders
Blood urea nitrogen (BUN) test for kidney disease What is considered a normal BUN level depends on your age and other health conditions you may have In general, about 7 - 20 mg dL is a normal level A higher than normal BUN level may be a sign that your kidneys are not working well