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Glucose in Serum (24-Hour Urine Collection)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of glucose (sugar) present in your urine over a 24-hour period.

Quick summary

["Understanding your urine glucose levels helps identify how your body handles sugar over time."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
47902-2
Short code
GH 2h p betaxolol+Gc SerPl-aCnc
Synonyms
GH 2h p betaxolol+Gc SerPl-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order this test to check for conditions like diabetes or kidney issues that affect how your body processes glucose. It can also help monitor long-term sugar control in people with diabetes.

What to Expect Before the Test

You’ll need to collect all urine for 24 hours, starting after you wake up. Store samples in a refrigerator and bring the entire collection to your lab. Follow any specific instructions your doctor provides to ensure accurate results.

What the Test Results Mean

The results show the total glucose excreted in your urine. High levels may suggest diabetes, poor kidney function, or other metabolic issues. Your doctor will interpret the results in relation to your overall health.

Common Conditions Monitored

This test is often used to diagnose or monitor diabetes, kidney disease, or conditions affecting glucose metabolism, such as gestational diabetes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Glucose in urine can indicate whether your body is unable to properly regulate blood sugar levels. Elevated levels may signal diabetes, where the body struggles to produce or use insulin effectively. Kidney issues can also cause glucose to appear in urine if the kidneys fail to reabsorb it back into the bloodstream.

Frequently asked questions

What does a positive result mean on this test?
A positive result means glucose was detected in your urine during the 24-hour collection. This could mean your body isn’t managing sugar well, which may relate to diabetes or other metabolic conditions. Your doctor will discuss the next steps based on your overall health and symptoms.
How often should I get this test?
Your doctor will determine how often you need this test based on your medical history, symptoms, and treatment plan. Regular monitoring may be recommended if you have diabetes or a history of kidney problems.
Can I eat or drink anything before the test?
Yes, you can eat and drink normally before the test. However, follow any specific instructions your doctor gives you, such as avoiding certain medications or foods that might affect urine glucose levels.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy