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Glucose in Plasma (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 to check for how well your body is managing blood sugar levels.

Quick summary

["Assesses long-term glucose excretion, useful for diabetes management and kidney function evaluation."]

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

Key facts at a glance

LOINC
33094-4
Short code
GA from CRL.Rempen91
Synonyms
GA from CRL.Rempen91
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-crl-rempen
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 properly. High levels may suggest diabetes or kidney issues, while low levels might raise concerns about dehydration or metabolic disorders.

What to Expect During the Test

You’ll collect all urine for 24 hours in a special container. Drink plenty of water to help flush out glucose, but avoid sugary drinks or foods. Your sample will be tested for glucose concentration in the urine.

Common Causes of Abnormal Results

Elevated glucose in urine can result from diabetes (high blood sugar), kidney problems, or infections. Low levels may occur with dehydration, certain medications, or metabolic imbalances.

How This Test Helps Your Doctor

Your doctor uses this test to diagnose diabetes, monitor kidney function, or check for conditions like glycosuria (unusual glucose in urine). It helps tailor treatments to your needs.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

What does a high glucose urine result mean?
A high result may signal diabetes, where your body struggles to regulate blood sugar, or kidney problems that filter glucose improperly. Your doctor will discuss next steps, such as blood sugar monitoring or further tests.
What if my glucose urine test is normal?
A normal result suggests your body is handling glucose well, but it doesn’t rule out diabetes entirely. Regular check-ups and lifestyle habits (like diet and exercise) remain important for long-term health.
Can diet affect this test?
Yes, high-sugar foods or drinks can temporarily raise urine glucose. To get an accurate reading, follow your healthcare provider’s instructions for fasting or avoiding sugary items during the 24-hour period.
  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