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.
What is a normal blood glucose level? A normal blood glucose level is any level below 100 milligrams per deciliter, or mg/dL, during periods of fasting or less than 140 mg/dL two hours after a meal, according to WebMD. However, most healthy people have blood glucose levels around 70 to 80 mg/dL.