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.
Ideally, your normal fasting blood sugar level should be less than 100 mg/dL, according to ClevelandClinic.com. If your level falls between 100 and 125 mg/dL, youâre considered prediabetic, and anything over that typically indicates diabetes.