What are normal blood sugar levels?


Quick Answer

In persons without diabetes, normal 'fasting' blood sugar levels are below 100 mg/dL; levels just prior to meals and snacks should be less than 110 mg/dL. Optimal levels are below 140 mg/dL two hours after meals and below 120 mg/dL before bed, according to Joslin Diabetes Center.

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What are normal blood sugar levels?
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Full Answer

Diabetes patients have slightly different blood sugar goals, notes Joslin Diabetes Center. Fasting blood sugar levels should range from 70 to 130 mg/dL, while target levels before meals and snacks typically range from 100 to 130 mg/dL. Diabetics should aim for less than 180 mg/dL within the two hours after meals and from 90 to 150 mg/dL before retiring for the night.

Hemoglobin A1c levels are ideally less than six percent in persons without diabetes and below seven percent for patients with diabetes, according to Joslin.

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