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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) found in your urine over a 24-hour period.

Quick summary

["Understanding your urine glucose levels helps identify how your body processes sugar."]

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

Key facts at a glance

LOINC
33077-9
Short code
GA from APAD.Lessoway98
Synonyms
GA from APAD.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-apad-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 Is Done

Your doctor may order this test if you have symptoms of diabetes, kidney issues, or unexplained sugar in your urine. It can also help monitor conditions like diabetic kidney disease or track how well your body handles glucose over time.

What to Expect Before the Test

You’ll need to collect all urine for 24 hours, typically starting after midnight one day and ending the same time the next day. Drink plenty of water but avoid sugary drinks or foods that could affect results. Your healthcare provider will give detailed instructions.

What Happens During the Test

No special procedure is needed. You’ll provide a sealed container with all your urine samples. The lab will analyze the combined sample for glucose levels.

What the Results Mean

Higher-than-normal glucose in urine can indicate diabetes, kidney problems, or poor control of blood sugar. Low or normal levels suggest your body handles glucose well. Your doctor will interpret results in the context of your overall health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

How often should I get this test?
This test is typically done once or twice a year for people with diabetes or kidney disease. Others may only need it if they have symptoms or risk factors. Follow your doctor’s recommendations for timing and frequency.
Can I eat or drink anything before collecting urine?
Yes, but avoid sugary foods, drinks, or medications that could affect glucose levels. Stick to regular meals and fluids unless instructed otherwise.
What if I miss any urine during the 24-hour collection?
If you miss urine, your test may not be accurate. Collect every drop for the full 24 hours to ensure reliable results. Contact your doctor if you cannot complete the collection as planned.
  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