🍬 Fasting Blood Glucose Explained

🔍 What Is a Fasting Blood Glucose Test?

A fasting blood glucose test measures how much sugar (glucose) is in your blood after not eating for at least 8 hours.

Doctors often order this test to:

This test looks at the amount of glucose in your bloodstream.

Glucose comes from:

Your body uses glucose as its main energy source.

Fasting glucose ranges vary slightly by lab, but results are often grouped as:

Your lab report will show your number and the reference range used.

Higher fasting glucose levels may be caused by:

One high reading alone does not confirm diabetes.

Low fasting glucose may be linked to:

Mild low readings often resolve quickly.

Glucose levels can change due to:

Day-to-day variation is normal.

Doctors may repeat this test if:

Doctors often confirm results with repeat testing or an A1C test.

A slightly high or borderline fasting glucose level is very common.

Many people improve levels with small lifestyle changes.

Fasting blood glucose shows how your body handles sugar when you haven’t eaten.

Results are most helpful when looked at over time, not from one test.

You may want to read:

You can also use the navigation bar above to explore other blood test results.

This information is for educational purposes only and is not medical advice. Always talk with a healthcare professional about your results.

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