Best blood sugar 4 or 5?

The best blood sugar is 4mmol/L or 5mmol/L. This question should be recognized that blood sugar is not as low as possible. For diabetics, blood sugar below 3.9 mmol/L is a hypoglycemia. Therefore, we should prevent blood sugar from falling too low. It may be like the general young patients with normal liver and kidney function. It is recommended that fasting blood sugar should be 5-7mmol/L. It is recommended not to fall below 5mmol/L to prevent hypoglycemia. Because we all know that hypoglycemia is actually more dangerous for people, it may show an irreversible damage to the heart and brain, serious words, the patient will show coma, so we should know that lowering blood sugar can not be as low as possible.