Glucose in Serum (24-hour profile)
This test measures your blood sugar levels over a 24-hour period to help assess how your body manages glucose, often used in evaluating diabetes or metabolic health.
["Understanding your body’s glucose balance over time can help manage diabetes or identify hidden metabolic issues."]
Key facts at a glance
- LOINC
- 11884-4
- Short code
- GA Clin est
- Synonyms
- GA Clin est
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- clinical-estimated
- 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 diabetes, prediabetes, or other conditions affecting blood sugar control. It can also help monitor long-term glucose trends, especially in people with chronic health conditions like kidney disease or heart problems.
What to Expect Before the Test
You’ll typically fast for 8 to 12 hours before the test. Blood samples are collected at multiple time points (often including fasting, mid-morning, and evening) to track glucose changes throughout the day. No special preparation beyond fasting is usually required, but follow your doctor’s instructions carefully.
How the Test Works
Blood is drawn from a vein (usually in your arm) at scheduled intervals. The samples are analyzed to measure glucose concentration, which is then used to create a profile of your glucose levels over the 24-hour period.
What the Results Mean
Results help identify patterns in your blood sugar, such as spikes or drops, which can indicate how well your body responds to insulin or other factors affecting glucose. Abnormal patterns may signal diabetes, insulin resistance, or other metabolic disorders.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is critical for diagnosing and managing diabetes, assessing insulin sensitivity, and detecting conditions like hypoglycemia (low blood sugar) or hyperglycemia (high blood sugar). It provides a more comprehensive picture than single-point glucose measurements, helping doctors tailor treatment plans to your needs.
Frequently asked questions
How often should I expect this test?
Will I need to fast before this test?
What if I miss a scheduled blood draw?
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