What is Creatinine?
Also written as：Cr ／ Serum Creatinine
Creatinine is a waste product generated by muscles. It is filtered by the kidneys and excreted in the urine. When kidney function declines, creatinine accumulates in the blood, making it a useful indicator of how well the kidneys are working. It is also used to calculate eGFR.
Reference range guideline
Generally, up to approximately 1.0 mg/dL for men and approximately 0.7 mg/dL for women are considered normal ranges (individual variation exists depending on muscle mass).
* Reference ranges vary by testing facility, measurement method, age, sex, and other factors. Please check the reference range printed on your result sheet.
How to interpret an out-of-range result
An elevated level may suggest reduced kidney function. Results are evaluated together with eGFR and urine protein. Creatinine levels may also be checked before contrast-enhanced CT or MRI procedures.
Related tests and conditions
Related terms
Sources & references
This page provides general information only and is not intended for diagnosis or treatment. Please consult the physician at your chosen facility regarding the interpretation of your health checkup results.