how long is a fasting blood sugar

A fasting blood sugar test typically requires you to fast (not eat or drink anything except water) for 8 to 12 hours before the test. This ensures accurate measurement of your blood glucose levels without the influence of recent food intake.

• Purpose: It helps diagnose prediabetes, diabetes, or monitor blood sugar control.
• Normal Range: Fasting blood sugar levels should be less than 100 mg/dL.
• Prediabetes: Levels between 100–125 mg/dL indicate prediabetes.
• Diabetes: Levels of 126 mg/dL or higher on two separate tests suggest diabetes.

Always follow your healthcare provider's instructions for fasting and testing.