Serum or plasma mass concentration of glucose (24-hour profile)

Why This Test Is Done

Your healthcare provider may order this test if you have diabetes or are at risk of developing it. It helps track how well your body manages blood sugar levels throughout the day, especially if you take insulin or other diabetes medications. Some people also get it to check for conditions like hypoglycemia (low blood sugar) or to monitor metabolic health.

How the Test Works

Instead of a single blood draw, this test involves collecting blood samples at regular intervals over 24 hours. The samples are then analyzed to measure glucose levels at each time point. The results are used to create a profile that shows how your blood sugar fluctuates during the day.

Sample Collection Process

You’ll need to follow specific instructions, often including fasting before the start of the test. Blood samples are drawn at set times (e.g., every few hours) into a special collection tube. The test may require you to stay at a clinic or hospital for the full 24 hours, depending on the protocol.

What to Expect After the Test

After completing the test, your healthcare provider will review the glucose profile to identify patterns, such as highs or lows, that might indicate how your body responds to food, activity, or medication. Results may be used to adjust treatment plans, like insulin doses or diet.