A BUN test measures the amount of urea nitrogen in your blood, which helps assess your kidney and liver function. Learn what a high or low BUN level means, how to prepare for the test, and what other tests may be needed. Learn everything about the Blood Urea Test – its normal values, purpose, preparation, and how to interpret your results to assess kidney health. Explore the significance of the blood urea normal range and its health implications. Learn how it affects kidney function and overall wellness. Read more. A blood urea test measures the amount of urea nitrogen in the blood, which is a waste product of protein breakdown. It helps evaluate the kidney function and diagnose kidney disease or damage. Learn about the normal ranges, causes of high or low urea levels, and the BUN/creatinine ratio.
