Glucose in Serum (24-hour profile)
This test measures your blood sugar levels over a 24-hour period using a sample of your serum. It helps assess how your body manages glucose over time, often used in diagnosing or monitoring conditions like diabetes.
["This test tracks your blood sugar naturally, not just at one time point."]
Key facts at a glance
- LOINC
- 68940-6
- Short code
- GH 90M p Exc SerPl-mCnc
- Synonyms
- GH 90M p Exc SerPl-mCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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
A 24-hour glucose profile provides a comprehensive picture of your body’s ability to regulate blood sugar. Unlike single-point measurements, it reveals patterns—such as spikes or drops—that might not be obvious from a single blood test. This can help doctors identify whether your glucose levels are consistently stable or if there are hidden issues, like insulin resistance or reactive hypoglycemia.
How It Works
Your serum sample is analyzed using a specialized method to measure glucose concentration at multiple intervals over 24 hours. The test may involve collecting blood at different times (e.g., fasting and post-meal) or using continuous monitoring techniques, depending on clinical protocols.
Preparation and Process
You may need to follow specific instructions, such as fasting for a portion of the day or avoiding certain foods/drinks. Your doctor will guide you on timing and sample collection. The test may require multiple blood draws or a specialized device for continuous monitoring, depending on the method used.
Common Uses
This test is typically used to diagnose or monitor diabetes, prediabetes, or other metabolic conditions. It can also help evaluate how well medications (like insulin or oral hypoglycemic drugs) are working or identify hidden glucose-related issues in people without obvious symptoms.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
What does a 24-hour glucose profile tell your doctor?
How long does it take to get results?
Can I eat or drink anything before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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