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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. It helps assess how well your body is managing blood sugar levels, often linked to conditions like diabetes.

Quick summary

["This test checks for hidden sugar in your urine, which can signal how your body handles blood sugar over time."]

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

Key facts at a glance

LOINC
33128-0
Short code
GA from TAD.Eriksen85
Synonyms
GA from TAD.Eriksen85
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-tad-eriksen
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

Your doctor may order this test if they suspect you have diabetes or pre-diabetes, or if you experience symptoms like frequent urination, excessive thirst, or unexplained weight changes. It can also help monitor long-term blood sugar control in people with diabetes.

How the Test Works

You’ll collect all your urine for a full 24-hour period in a special container. The urine is then sent to the lab for analysis to measure glucose levels. This provides a more complete picture than a single urine sample.

What to Expect Before the Test

No special preparation is needed, but you should drink enough water to produce urine throughout the day. Avoid using diuretics or medications that affect urine sugar levels without consulting your doctor.

What to Expect During the Test

You’ll collect your urine in a container at home or at a clinic, depending on your doctor’s instructions. The test involves emptying your bladder into the container every time you urinate, including during sleep.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Elevated glucose in urine can indicate diabetes or impaired glucose tolerance. It may also appear in other conditions like kidney disease or certain infections. Persistently high levels can signal poor blood sugar management and may require lifestyle changes, medication adjustments, or further medical evaluation.

Frequently asked questions

Will I feel any discomfort during the test?
No, there’s no discomfort involved. You’ll simply be collecting your urine in a container as usual. If you’re unsure about the process, ask your healthcare provider for guidance.
How long will it take to get my results?
Results are typically available within a few days to a week, depending on your lab’s processing time. Your doctor will discuss the results with you during your follow-up visit.
Can I drink alcohol before the test?
Alcohol may affect urine volume and composition. It’s best to avoid it for 24 hours before starting your urine collection to ensure accurate results.
  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