Glucose, 24-Hour Urinary Collection (Quantitative)

Your doctor may order this test to help find out what is causing your symptoms, to check how well an organ or system in your body is working, or to look for early signs of a health condition. The results can also guide treatment decisions and help monitor a condition you already have.

Doctors may order this test to evaluate long-term blood sugar control, especially in people with diabetes. It can also help diagnose conditions like kidney issues or metabolic disorders that affect sugar metabolism.

This test involves a routine, well-established procedure performed by trained health care professionals. Depending on the type of test, a small sample of blood, urine, or other tissue may be collected, or special equipment may be used to take pictures or measurements of your body. Most tests take only a short time, and your care team will explain each step before it begins.

You’ll collect all urine for a 24-hour period, typically starting after waking up and continuing until the next morning. The sample is then sent to the lab for analysis.

Before the test, your health care provider will give you specific instructions to follow. You may be asked not to eat or drink for a certain number of hours, to stop taking certain medicines temporarily, or to avoid specific activities. Wear comfortable, loose-fitting clothing and leave jewelry and valuables at home. Tell your care team if you are pregnant, have allergies, take blood thinners, or have any implanted medical devices, because these details can affect how the test is performed.

No special preparation is needed, but you may be asked to avoid certain medications or foods that could interfere with results. Drink plenty of water to help flush out glucose naturally.

During the test, a member of your care team will walk you through each step and answer any questions you have. You may be asked to sit or lie still while a sample is collected or while the equipment is used. Most people feel little more than brief discomfort, such as a quick pinch when a needle is inserted. The entire process usually takes only a few minutes, and a staff member will stay with you the whole time.

You’ll collect urine in a container at home or at a clinic, changing the container every few hours. Some people may need to wear a special urine collection device for convenience.