Insulin delivery refers to the methods used to administer insulin, a hormone that helps regulate blood sugar levels in people with diabetes. Common delivery methods include injections using syringes or pens, as well as insulin pumps that provide a continuous supply of insulin through a small tube. Another option for insulin delivery is the use of inhalers, which allow patients to inhale insulin powder. Each method has its advantages and disadvantages, and the choice often depends on individual preferences, lifestyle, and medical advice from healthcare providers.