what's a normal fasting blood sugar

A normal fasting blood sugar level typically falls within the following ranges:

• Normal: 70 to 99 mg/dL (3.9 to 5.5 mmol/L)
• Prediabetes: 100 to 125 mg/dL (5.6 to 6.9 mmol/L)
• Diabetes: 126 mg/dL (7.0 mmol/L) or higher on two separate tests

Fasting blood sugar is measured after not eating or drinking anything except water for at least 8 hours. It's an important indicator of your overall blood sugar control and can help diagnose prediabetes or diabetes.