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Creatinine

Creatinine is a waste product formed by the breakdown of a substance (creatine) important for converting food into energy (metabolism). The creatinine is filtered out of the blood by the kidneys and then passed out of the body in urine.

If the kidneys are damaged and can't function normally, the amount of creatinine in the urine decreases while the amount of creatinine in the blood increases.

By Healthwise Staff
Primary Medical Reviewer E. Gregory Thompson, MD - Internal Medicine
Specialist Medical Reviewer Michael Mallea, MD - Nephrology
Last Revised August 9, 2012

WebMD Medical Reference from Healthwise

Last Updated: August 09, 2012
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