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Glucose in Plasma (24-Hour Profile)

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

This test measures your blood sugar levels over a 24-hour period to help assess how your body manages glucose, often used to evaluate diabetes or insulin sensitivity.

Quick summary

["This test helps doctors check how well your body controls blood sugar throughout the day."]

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

Key facts at a glance

LOINC
106584-6
Short code
CGLDNA
Synonyms
C glabrata DNA Fld Ql NAA+n-prb
Category
chemistry
Sample
serum
Container
Sterile, leak-proof container; serum separator tube (SST) or red-top tube for serum specimens
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
non-probe-amp-tar
CPT
87481
SNOMED
122450008
Specimen volume
1-2 mL of serum
Stability
Refrigerated (2-8°C): 7 days; Frozen (-70°C or below): 30 days; Room temperature: 24 hours
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
24–72 hours
Order
routine

Why This Test Is Done

Your doctor may order this test if they suspect you have diabetes, prediabetes, or another condition affecting blood sugar regulation. It can also help monitor long-term glucose control in people with known diabetes.

What to Expect Before the Test

You’ll typically fast overnight before this test. A healthcare provider will collect blood samples every few hours over 24 hours to measure glucose levels at different times.

How the Test Works

Blood samples are taken from a vein in your arm or hand. Glucose levels are measured using a specialized lab method to track changes throughout the day.

What the Results Mean

Results help identify patterns in your blood sugar, such as spikes or drops, which can indicate how your body responds to food, activity, or medications.

Reference range

Negative (Not Detected) for Candida glabrata DNAN/A

Specimen: serum

No fasting required. Specimen should be collected prior to initiation of antifungal therapy when possible. Avoid contamination of specimen with skin flora.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test provides critical insights into glucose metabolism, helping diagnose diabetes, assess insulin resistance, or evaluate treatment effectiveness in managing blood sugar levels over time.

Short name

24-Hour Plasma Glucose Profile

Frequently asked questions

How often should I expect this test?
This test is usually done once, but your doctor may recommend repeat testing if needed for ongoing monitoring or specific medical reasons.
What does a normal result mean?
Normal results don’t have a single range since they track glucose changes throughout the day. Instead, they show whether your body’s glucose levels stay within a healthy pattern over 24 hours.
Can I eat or drink anything before the test?
No, you’ll need to fast before the test, following your doctor’s instructions for proper preparation.
  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