Insulin is usually injected into an area where a layer of fatty tissue is present that is, where large blood vessels, nerves, muscles and bones are not close to the surface. This is because direct injection of insulin into the bloodstream would make it act too fast. Insulin is absorbed most evenly from injections in the abdomen except for the 2-inch radius around the navel. The site of injection should be rotated. Consult your doctor to show you the recommended areas for injection and the correct technique of insulin administration.

Insulin is the main hormone, a polypeptide, that regulates uptake of glucose into cells (primarily muscle and fat cells) from the blood. Insulin is released in the beta cells of the islet of Langerhans in the pancreas, the gland that lies just behind the stomach.

Insulin is usually injected in an area where a layer of fatty tissue is present that is, near the abdomen except for the 2-inch radius around the navel. The site of injection should be rotated to prevent irritation.