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Glucose in Serum (24-hour urinary collection)

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

This test measures the amount of glucose (sugar) excreted in your urine over a full day. It helps assess how well your body manages blood sugar levels, especially in conditions like diabetes.

Quick summary

["Helps diagnose or monitor diabetes and kidney function related to glucose handling."]

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

Key facts at a glance

LOINC
33137-1
Short code
GA from TTD.lessoway98
Synonyms
GA from TTD.lessoway98
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-estimated-from-ttd-lessoway
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 Matters for Your Health

Glucose in urine can indicate whether your body is processing sugar efficiently. High levels may suggest diabetes, poor kidney function, or uncontrolled blood sugar. Low levels might raise concerns about inadequate sugar excretion, though this is less common.

How the Test Works

You’ll collect all urine for 24 hours, typically starting after waking up and discarding the first void. The sample is then tested for glucose content. This method provides a comprehensive picture of your body’s glucose metabolism over time.

What to Expect Before the Test

No special preparation is needed, but you’ll need to: • Collect all urine in a container for 24 hours. • Keep the sample refrigerated if possible. • Return it to your lab on time to avoid errors.

Common Causes of Abnormal Results

High urinary glucose may result from diabetes (type 1 or 2), kidney issues, or medications. Low levels are rare but could signal metabolic disorders or errors in collection. Always discuss results with your healthcare provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

24-Hour Urinary Glucose

Frequently asked questions

Why was this test ordered?
Your doctor may have ordered this test to check for diabetes, monitor blood sugar control, or evaluate kidney function. It can also help diagnose conditions like glycosuria (glucose in urine) or rule out metabolic imbalances.
What do my results mean?
Results are interpreted by your healthcare provider based on your medical history and symptoms. High levels often trigger further testing for diabetes or kidney disease, while low levels may prompt additional metabolic evaluations.
How can I manage glucose levels at home?
If you have diabetes, follow your prescribed diet, exercise regularly, and monitor blood sugar. For non-diabetic individuals, maintaining a balanced diet, staying hydrated, and avoiding excessive sugar intake may help support normal glucose metabolism.
  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