Serum Creatinine Concentration (Mass Concentration)

Why This Test Matters

Creatinine is a byproduct of muscle breakdown and is filtered out of your blood by your kidneys. High levels can indicate reduced kidney function, while low levels may suggest overhydration or other conditions. This test is often used alongside other measures to monitor kidney health, especially in people with diabetes, hypertension, or a history of kidney disease.

What to Expect Before the Test

You can eat and drink normally before this test. No special preparation is needed unless your doctor instructs otherwise. Bring any medications you’re currently taking, as some may affect results.

How the Test Works

A blood sample is taken from a vein, usually in your arm. The sample is sent to a lab where it’s analyzed to measure creatinine levels using a specialized method, often automated and highly precise.

Possible Results and Interpretation

Results are typically reported in units of milligrams per deciliter (mg/dL) or milligrams per liter (mg/L). While reference ranges vary by lab, higher than expected levels may signal kidney issues, while very low levels might warrant further investigation into hydration status or other health factors.