The ideal blood sugar level depends on whether you have diabetes or not. A healthy (normal) fasting blood glucose level for someone without diabetes is 70 to 99 mg/dL (3.9 to 5.5 mmol/L) . Values between 50 and 70 mg/dL (2.8 to 3.9 mmol/L) for people without diabetes can also be considered normal. For people with diabetes, the American Diabetes Association recommends target levels of 80 to 130 mg/dL before eating and less than 180 mg/dL within 2 hours of eating a meal. Blood glucose levels can change throughout the day, and they tend to be at their lowest point before the first meal of the day. Its important to keep blood sugar levels within a safe range to reduce the risk of diabetes and heart disease. If you have diabetes or are experiencing symptoms of low or high blood sugar, you should see a doctor.