Typically, a person’s fasting blood sugar level should be below 99 milligrams per deciliter (mg/dL). Keeping blood glucose levels within a safe range can reduce the risk of diabetes and heart disease.

A normal fasting blood sugar level for someone between the ages of 50 and 60 is between 70 and 99 mg/dL. Blood sugar (glucose) targets for older people with diabetes tend to be different than for ...