Blood glucose tests, which can be conducted in our pharmacy through a simple blood test, measure the amount of glucose in your blood. Glucose is a simple sugar that provides energy for the body. The amount of sugar in the blood is controlled by a hormone called insulin, which is produced by the pancreas (a gland behind the stomach). When food is digested and enters your bloodstream, insulin moves glucose out of the blood and into cells, where it's broken down to produce energy. However, if you have diabetes, your body is unable to break down glucose into energy. This is because there's either not enough insulin to move the glucose, or the insulin produced doesn't work properly.