Muffler (silver) and exhaust pipe on a Ducati 695 motorcycle. A muffler (silencer in English) is a device for reducing the amount of noise emitted by the exhaust of an internal combustion engine.
Quick Answer. Normal blood sugar levels should be  less than 100 mg/dL when fasting and less than 140 mg/dL two hours after eating, according to WebMD. People without diabetes tend to have blood sugar levels of around 60 to 90 mg/dL before eating.
So what should your fasting blood sugar be? The normal blood sugar range is 65-99 mg/dL. If your fasting blood sugar is between 100 and 125 mg/dL, you have âimpaired fasting glucose,â also referred to as âprediabetes.â If your fasting blood sugar is more than 126 mg/dL on two or more occasions, you have full-blown diabetes.