Lab test
Glucose Blood Test - Blood Sugar Lab Testing
A glucose blood test measures the amount of glucose, or blood sugar, in the blood.
- Typical price
- From $28
- Results
- 1-3 business days
- Preparation
- See preparation notes below
- Sample
- Blood draw or sample collection at a local center
About this test
A glucose blood test measures the amount of glucose, or blood sugar, in the blood. Glucose is the body's main source of energy and is used by cells throughout the body, including the brain. The test is used to screen for and monitor diabetes and prediabetes, to investigate symptoms of low or high blood sugar, and to follow blood sugar during certain treatments. It may be collected as a fasting sample or at any time, depending on the question being asked. A single glucose value is a snapshot and is interpreted by a healthcare provider with other information.
What this test measures
- Glucose (blood) The concentration of glucose in the blood, reflecting how the body is managing blood sugar at the time of collection.
Who this test may be right for
- Adults being screened for diabetes or prediabetes
- People with diabetes who monitor blood sugar control
- Individuals with symptoms such as excessive thirst, frequent urination, or fatigue
- People with symptoms of low blood sugar, such as shakiness or confusion
- Anyone whose healthcare provider wants to evaluate blood sugar
Before your visit
- If a fasting glucose is requested, fast for about 8 hours before the draw; water is allowed
- A random glucose test can be done without fasting
- Tell the lab about diabetes medications and other drugs that affect blood sugar
- Follow the specific instructions provided with your order
Understanding your results
A high glucose level may indicate hyperglycemia and can be associated with diabetes or other conditions, while a low level may indicate hypoglycemia and can be associated with certain medications or metabolic issues. A single reading can be affected by recent food, stress, and illness, so one result does not confirm a diagnosis. Results are interpreted with symptoms, other tests such as hemoglobin A1c, and your history. Discuss your glucose result with a healthcare provider before drawing conclusions.
Order this test online
- Buy online in a few minutes - no doctor's visit needed for most tests.
- Sample collection at a patient service center near you.
- Results are typically ready within 1-3 business days.
- Secure, lab-reviewed results delivered to your account.
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Questions people ask
What does the glucose blood test measure?
It measures the concentration of glucose, or blood sugar, in the blood at the time the sample is collected.
Do I need to fast for a glucose test?
If a fasting glucose is ordered, fast for about 8 hours beforehand; water is allowed. A random glucose test can be collected without fasting, so follow the instructions with your order.
What does a high glucose level mean?
A high glucose level may indicate hyperglycemia and can be associated with diabetes or other conditions, but one reading is not a diagnosis. A healthcare provider interprets it with your symptoms and other tests.
What does the Glucose Blood Test - Blood Sugar Lab Testing measure?
The glucose test is a blood test used to measure glucose (blood sugar) levels.
Do I need to fast before this test?
Follow the lab's instructions.
How long do results take?
Most Glucose Blood Test - Blood Sugar Lab Testing results are released in 1-3 business days. Specialty testing can take longer.
Is this test right for me?
This page is educational and not medical advice. Talk to a licensed healthcare provider about which tests fit your situation.
LabBookings is an independent directory. We compare test details and pricing information, but we are not a laboratory and we do not perform testing or provide medical advice. Always talk to a licensed healthcare provider about your results and treatment.
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