Glucose, 24-Hour Urinary Collection (Total)

Why Is This Test Done? Your doctor may order this test to help find the cause of your symptoms, check how well an organ or body system is working, or monitor a condition you are already being treated for.

Your healthcare provider may order this test to check for abnormal glucose levels in urine, which can indicate diabetes, kidney problems, or other metabolic conditions. It’s particularly useful for detecting glucose spillage in urine that isn’t due to high blood sugar levels (e.g., in kidney disease).

Before your test, your care team will explain how to get ready. You may be asked to stop taking certain medicines, avoid food or liquids for a set amount of time, or follow other special instructions depending on the type of test you are having.

You’ll need to collect all urine for a full 24-hour period, typically starting after midnight and ending the same day the next morning. Use clean containers to store the urine, and discard the first morning urine. Bring the collected sample to your lab with a timeline log to confirm completeness.

During the test, a trained technician, nurse, or doctor will guide you through each step and help you stay as comfortable as possible. The procedure is usually quick, and your care team will let you know what is happening along the way so there are no surprises.

No special preparation is needed beyond collecting urine over 24 hours. The lab analyzes the total glucose content in the combined sample to determine the amount excreted.

Your results will be reviewed by a doctor and shared with you at a follow-up visit or through your patient portal. Results within the normal range usually mean no problem was found, while values that are higher or lower than expected may call for more testing or monitoring.

Results are typically reported as the total amount of glucose excreted in grams or milligrams over 24 hours. Higher-than-normal amounts may suggest kidney issues or diabetes, while very low levels might indicate poor urine collection or underlying metabolic disorders.