Fasting Blood Glucose (FBG) Test
Blood
Diabetes
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Fasting Blood Glucose (FBG) Test Normal Reference Ranges
| Parameter | Normal Range |
|---|---|
| Normal | 70–100 mg/dL |
| Prediabetes | 100–125 mg/dL |
| Diabetes | 126 mg/dL or higher |
A single elevated reading is usually confirmed with a repeat test or HbA1c before a formal diabetes diagnosis is made, since factors like recent illness, stress, or an incomplete fast can temporarily raise glucose levels.
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Quick Facts
CategoryDiabetes
Specimen TypeBlood
Organ System—
Available At0 labs
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