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biochemistryHas Critical Values
Fasting Blood Glucose
FBG· also: FBS, FPG
Clinical Overview
Fasting blood glucose is measured after at least 8 hours of fasting. It is the primary test for diagnosing diabetes and pre-diabetes.
Reference RangesWHO/IFCC standards
| Reference Range | Unit | Notes |
|---|---|---|
| 70 – 99 | mg/dL | Normal |
| 100 – 125 | mg/dL | Pre-diabetes (IFG) |
Also reported in: mmol/L.Conversion factor: 1 mmol/L = 0.056 mg/dL.
Critical (Panic) Values
Critical Low: < 40 mg/dL. Critical High: > 500 mg/dL. Values outside these limits require immediate clinical attention.
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Related Topics
diabetesglucosepre-diabetesfasting