What is BUN on lab results?

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BUN means blood urea nitrogen, a blood test related to how the body handles protein waste and how the kidneys are working. AI can explain the term and common reasons it may be high or low, but hydration, medicines, diet, kidney function, and symptoms need clinician review.

Indexed sources

[1] High trust

MedlinePlus: BUN blood test

Plain-language explanation of blood urea nitrogen testing and result context.

Indexed page Original source

[2] Medium trust

Johns Hopkins Lupus Center: Blood chemistry panel

Clinical education page describing BUN and creatinine as kidney-function tests.