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Home/Medical Dictionary/Blood urea (yoo-REE-uh) nitrogen (NY-truh-jen) (BUN)

Blood urea (yoo-REE-uh) nitrogen (NY-truh-jen) (BUN)

A waste product in the blood that comes from the breakdown of food protein. The kidneys filter blood to remove urea. As kidney function decreases, the BUN level increases.

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