Glucose in Serum (24-hour profile)

Why This Test Is Done

Doctors may order a 24-hour glucose profile to evaluate how well your body controls blood sugar levels, particularly if you have symptoms of diabetes, prediabetes, or other metabolic conditions. It can also help determine the effectiveness of treatments like insulin or oral medications.

What to Expect Before the Test

You’ll need to follow specific instructions, such as fasting or avoiding certain foods, depending on the protocol. Blood samples will be collected at set times throughout the day. Your healthcare provider will guide you on preparation, including any dietary restrictions or medications to pause.

How the Test Works

Blood is drawn from a vein in your arm at scheduled intervals (e.g., every 2–4 hours) to measure glucose concentration in your serum. The samples are then analyzed in a lab using an immunoassay or enzymatic method to determine glucose levels at each time point.

Sample Collection Process

Blood is drawn in a sterile manner by a healthcare professional. You may feel a slight pinch or discomfort, but it typically lasts only a few seconds. The test is generally quick and painless, though you may experience mild bruising or swelling at the site.