Description
Creatinine is one of the most reliable single markers of kidney function, offering a focused measurement of how effectively your kidneys are filtering waste.
About the Creatinine Test
Creatinine is a waste product produced by normal muscle activity and cleared from the blood by the kidneys. When kidney function declines, creatinine rises. Measuring it — and using it to estimate your filtration rate (eGFR) — is a simple, dependable way to assess kidney health, screen for early kidney disease, and monitor known conditions or the effects of medication.
Preparation and turnaround
A quick venous blood sample is taken with no fasting required, though normal hydration is helpful. Results are usually available within one working day. Because creatinine is influenced by muscle mass, results are best interpreted by a doctor, often as part of a wider kidney profile.
Frequently asked questions
What does a high creatinine level mean?
A raised level can indicate reduced kidney function. It is usually interpreted alongside your eGFR and other kidney markers.
Does muscle mass affect the result?
Yes. Creatinine reflects muscle activity, so very muscular or low-muscle individuals may have naturally higher or lower levels, which your doctor takes into account.
Is fasting needed?
No fasting is required, though staying normally hydrated is recommended.
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