glucose · FPG · GLU
Fasting Glucose
Blood sugar after an overnight fast — a snapshot of glucose regulation.
This page is general wellness education, not medical advice. Your own lab’s reference range and your clinician’s interpretation always take precedence.
Typical reference range
| Group | General range |
|---|---|
| Adults | Normal 70–99 mg/dL; 100–125 prediabetes; ≥126 diabetes range |
Units: mg/dL. Ranges vary by lab and assay — read yours against the range printed on your own report.
What high Fasting Glucose can mean
- Insulin resistance
- Stress/illness
- Recent meal (non-fasting)
- Some medications (steroids)
What low Fasting Glucose can mean
- Too much glucose-lowering medication
- Prolonged fasting
- Excess alcohol