Understanding Blood Sugar Levels: Normal Ranges and When to Consult a Doctor

For a person without diabetes, typical blood glucose ranges are:

• Fasting (before a meal): 70–100 mg/dL (3.9–5.6 mmol/L)
• Two hours after a meal: Less than 140 mg/dL (7.8 mmol/L)

Levels consistently above these ranges may indicate prediabetes or diabetes. If your readings are higher, consult a healthcare professional for evaluation, which may include an HbA1c test, oral glucose tolerance test, or continuous glucose monitoring. Early intervention with lifestyle changes or medication can prevent complications.