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 should it be? A normal fasting blood glucose target range for an individual without diabetes is 70-100 mg/dL (3.9-5.6 mmol/L). The American Diabetes Association recommends a fasting plasma glucose level of 70â130 mg/dL (3.9-7.2 mmol/L) and after meals less than 180 mg/dL (10 mmol/L). Individuals with hypoglycemic unawareness (limited or no awareness of low blood glucose symptoms) may require a higher target range.