BUN has various meanings in the Medical category. Discover the full forms, definitions, and usage contexts of BUN in Medical.
The liver produces urea in the urea cycle as a waste product of the digestion of protein. Normal human adult blood should contain between 6 and 20 mg of urea nitrogen per 100 ml (6–20 mg/dL) of blood. Individual laboratories will have different reference ranges as the assay used will vary between laboratories.
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