Serum Creatinine Concentration (Mass Concentration)

Why It Matters in Your Health

Creatinine is a byproduct of muscle breakdown and is normally filtered out of your blood by your kidneys. If your kidneys aren’t working well, creatinine builds up in your blood. This test helps doctors monitor kidney function, especially in people with diabetes, high blood pressure, or other conditions that can affect the kidneys.

What to Expect During the Test

You’ll have a small needle inserted into your arm or vein to draw a blood sample. The process is quick and usually painless. No special preparation is needed, but your doctor may advise you to avoid certain foods or medications before the test if directed.

Factors That Can Affect Results

Several factors can influence creatinine levels, including muscle mass (higher muscle mass can lead to higher levels), dehydration, recent exercise, or certain medications. If you’ve had recent surgery, trauma, or changes in diet, let your healthcare provider know.

Common Reasons for Testing

Doctors may order this test to check for kidney disease, evaluate chronic conditions like diabetes or heart disease, monitor treatment progress, or screen for kidney problems before surgery or other medical procedures.