Glucose, Plasma (24-hour profile)

Why This Test Is Done

A 24-hour glucose profile is often recommended for people with suspected diabetes, insulin resistance, or unexplained blood sugar fluctuations. It provides a detailed picture of how your body processes glucose, which can help identify patterns like reactive hypoglycemia or impaired glucose tolerance that standard single-point measurements might miss.

What to Expect Before the Test

You’ll typically fast overnight before collecting samples, with blood drawn at regular intervals (e.g., every 2–4 hours) over 24 hours. Follow your doctor’s instructions carefully to ensure accurate results. You may need to wear a special monitor or use a continuous glucose sensor to track levels at home.

How the Results Are Used

Your doctor will analyze the full profile to identify trends, such as peaks or drops in blood sugar, which can guide treatment decisions. For example, if levels spike after meals, your doctor may adjust medications or lifestyle recommendations.

Common Conditions Monitored

This test is particularly useful for diagnosing or managing diabetes (including type 1 and type 2), prediabetes, reactive hypoglycemia, or conditions like Cushing’s syndrome or pancreatic issues that affect glucose metabolism.