Health authorities consider a normal fasting blood sugar level to be below 99 milligrams per deciliter (mg/dL).

In people with diabetes, the levels will change more. Instead of targeting a specific level, the aim of managing blood sugar is to keep the levels within a healthy range.

The American Diabetes Association recommend target levels of 70–130 mg/dL before eating for a person with diabetes. Within 2 hours of eating a meal, blood glucose levels should be less than 180mg/dL.
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