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.
As I have always recommended you (and normal blood sugar range adults is also the recommendation of ADA for diabetes management), every diabetic should have his/her own normal ranges. In other words, if in general, the normal ranges are between 70 and 120 mg/dl; this does not mean that is your normal range. If normal blood sugar range adults you discuss this with your doctor, your normal ranges could be higher than of the general, which is also called acceptable sugar levels . Therefore, you should write your acceptable levels normal blood sugar range adults and compare each record with them.