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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) excreted in your urine over a full day. It helps assess how well your body manages blood sugar levels, especially important for people with diabetes or kidney function concerns.

Quick summary

["This test helps track long-term sugar balance and kidney function in urine."]

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

Key facts at a glance

LOINC
33103-3
Short code
GA from FL.Tokyo86
Synonyms
GA from FL.Tokyo86
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-fl-tokyo
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 diabetes, kidney disease, or symptoms like frequent urination, excessive thirst, or unexplained weight changes. It can also help monitor treatment effectiveness for conditions affecting blood sugar or kidney function.

What to Expect Before the Test

You’ll need to collect all urine for a full 24-hour period, typically starting after midnight one day and ending the same time the next day. Drink plenty of water to help your kidneys pass urine, but avoid sugary drinks or foods that could affect results. Follow your healthcare provider’s instructions carefully.

How the Test Works

The collected urine is analyzed to measure glucose levels. The test checks how much sugar appears in your urine, which can indicate how well your body regulates blood sugar or if your kidneys are filtering it properly.

Test Results Interpretation

Results are compared to your baseline or clinical needs, not provided as a single reference range. High urine glucose may suggest uncontrolled diabetes or kidney issues, while low or normal levels may indicate proper blood sugar management.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

24-Hour Urine Glucose

Frequently asked questions

What does a high urine glucose level mean?
A high urine glucose level may indicate poorly controlled diabetes, where your body can’t regulate blood sugar effectively. It can also signal kidney problems, as healthy kidneys filter out excess glucose. This test helps doctors assess long-term sugar balance and kidney function.
What does a low or normal urine glucose level mean?
Low or normal urine glucose levels typically mean your body is managing blood sugar well and your kidneys are functioning normally. However, if you have diabetes, consistently low levels might suggest your treatment is working, but this should always be discussed with your doctor.
Does diet or medications affect this test?
Yes, diet (especially sugary foods or drinks) and certain medications (like diuretics) can influence urine glucose levels. Always inform your healthcare provider about any changes in diet, medications, or symptoms before the test.
  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