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Glucose in Plasma (24-Hour Urinary 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 urinary 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
11899-2
Short code
GA from BPD.Campbell75
Synonyms
GA from BPD.Campbell75
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-bpd-campbell
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, such as frequent urination, excessive thirst, or unexplained weight changes. It can also help check for conditions like kidney disease or metabolic disorders that affect sugar metabolism.

What to Expect Before the Test

You’ll need to collect all urine produced in a 24-hour period in a special container. Drink plenty of water but avoid sugary drinks or foods that could affect results. Follow your healthcare provider’s instructions carefully.

What Happens During the Test

No special preparation is needed beyond collecting urine over 24 hours. The test is typically done at home or in a clinic, and results are analyzed to determine the total glucose excreted in urine.

What the Results Mean

Higher-than-normal results may indicate diabetes or other metabolic issues. Lower-than-normal results could suggest dehydration or certain medications affecting urine composition. Always discuss results with your doctor.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

What causes abnormal urinary glucose levels?
Abnormal levels may result from diabetes (high glucose), kidney issues (glucose spills into urine), or certain medications. Other factors like dehydration, infections, or hormonal imbalances can also play a role.
Can diet affect this test?
Yes, high-sugar foods or drinks can temporarily increase urinary glucose. Follow your provider’s instructions to avoid dietary influences during the 24-hour collection period.
How often should this test be repeated?
Your doctor will determine frequency based on your symptoms, medical history, and test results. Repeat testing may be needed if initial results are concerning or if managing a condition like diabetes.
  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