Serum Creatinine (Standard Method)

Why This Test Matters

Your kidneys normally filter waste products, including creatinine, from your blood. High levels may indicate poor kidney function or damage, while low levels could suggest muscle breakdown or other conditions. This test is often used alongside other kidney function tests to monitor kidney health, especially in people with diabetes, high blood pressure, or a history of kidney disease.

What to Expect Before the Test

No special preparation is needed for this test. You may have a small needle inserted into your arm or vein to draw blood. If you’re on a low-protein diet or have recently exercised heavily, your doctor may advise timing your test to avoid potential variations in results.

Common Causes of Abnormal Results

Elevated creatinine levels may signal kidney problems, dehydration, or conditions like muscle disorders or heart failure. Low levels might suggest dehydration, muscle loss, or certain liver or heart conditions. Always discuss any symptoms or concerns with your healthcare provider.

How Results Are Interpreted

Results are typically compared to a reference range provided by your lab. While ranges can vary slightly by lab, they help identify whether your levels are within normal limits or if further investigation is needed.