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Glucose in Serum (24-hour Urine Collection)

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

This test measures the total amount of glucose (sugar) excreted in your urine over a 24-hour period. It helps assess how well your body is handling glucose metabolism, often linked to conditions like diabetes.

Quick summary

["Helps diagnose or monitor conditions affecting blood sugar control in urine."]

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

Key facts at a glance

LOINC
63258-8
Short code
GT1b Ganlg IgG+IgM Ser Ql IA
Synonyms
GT1b Ganlg IgG+IgM Ser Ql IA
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
CPT
82784
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 they suspect you have diabetes or prediabetes, or if you have symptoms like frequent urination, excessive thirst, or unexplained weight changes. It can also be used to check for conditions like kidney disease or certain metabolic disorders that affect glucose handling.

How the Test Is Taken

You’ll collect all urine produced in a 24-hour period in a special container. The test involves measuring the total glucose content in this urine sample, which is then sent to a lab for analysis.

What to Expect Before the Test

No special preparation is needed, but you should drink enough fluids to produce urine throughout the day. Avoid using diuretics or medications that may affect urine glucose levels unless instructed otherwise.

What to Expect During the Test

You’ll collect urine in a container for 24 hours, typically starting after you urinate in the morning. Store the container in a cool place, and discard the first morning urine to ensure accurate results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Elevated urine glucose levels can indicate diabetes, where the body struggles to regulate blood sugar properly. It may also signal kidney issues or other metabolic disorders. Consistently high levels can help guide treatment plans, such as adjusting medications or lifestyle changes.

Short name

24-Hour Urine Glucose

Frequently asked questions

How long does it take to get results?
Results are usually available within 1 to 3 business days, depending on your lab’s processing schedule.
What does a high urine glucose level mean?
A high urine glucose level often suggests your body isn’t effectively controlling blood sugar, which can be a sign of diabetes or another metabolic condition. Your doctor will discuss your results and next steps with you.
Can I eat or drink anything before the test?
Yes, you can eat and drink normally, but avoid using glucose-containing medications or supplements unless your doctor advises otherwise. Drink plenty of water to ensure adequate urine production.
  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