If you have diabetes your doctor may ask you to keep track of your blood sugar by testing it at home with a special device called a blood glucose monitor or home blood sugar meter. Blood sugar measurement is also typically included in routine lab work for people without diabetes your physician will usually order a glycated hemoglobin a1c test which measures your average. Blood glucose is measured using a kind of confusing system that exists out of our stubbornness to change outdated systems or to keep doctors and scientists in business. In the usa its measured using milligrams per deciliter mgdl. Meters that test other sites. A measurement of 100 mg per dl means that there are 100 milligrams of glucose for every deciliter of blood in your system.
The bodys homeostatic mechanism of blood sugar regulation known as glucose homeostasis when operating normally restores the blood sugar level to a narrow range of about 44 to 61 mmol l 79 to 110 mgdl as measured by a fasting blood glucose test. A high reading on a fasting blood sugar test is typically the first sign of diabetes or pre diabetes. You can get blood sugar meters and strips at your local pharmacy. Newer meters let you test sites other than your fingertip such as your upper arm forearm base of. In the uk and commonwealth countries its measured using millimoles per liter mmoll.