If you have Type 1 diabetes, you must take insulin because your pancreas is not making it. The insulin will lower your blood glucose levels by moving the glucose from the bloodstream into your cells.
Insulin cannot be taken by mouth. Rather, it must be taken by injection into the subcutaneous layer of fat just below your skin. There are four main places where you can do this: your abdomen, the back of your upper arm, the front and upper outside of your thigh or the upper and outside area of your buttocks.