A waste product produced by muscles and filtered from the blood by the kidneys to be excreted in urine.
Creatinine is the anhydride of CREATINE and is derived from it. It is a metabolic waste product.
It is the waste product of creatine, an enzyme found in large amounts throughout the tissues, and mainly excreted in the urine. The parent compound creatine enables the body to use the “blue flame” of anaerobic combustion (as opposed to the yellow flame of oxidation). Elevated creatinine in the blood may be an early symptom of kidney disease.
n. a substance derived from creatine and creatine phosphate in muscle. Creatinine is excreted in the urine.
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