Insulin therapy is a treatment for people with diabetes that involves using insulin to help control blood sugar levels. Insulin is a hormone produced by the pancreas that allows cells to absorb glucose from the bloodstream. In individuals with diabetes, the body either does not produce enough insulin or cannot use it effectively, leading to high blood sugar levels. There are different types of insulin, including rapid-acting, short-acting, intermediate-acting, and long-acting. Patients may use insulin injections or an insulin pump to deliver the hormone. Proper management of insulin therapy can help prevent complications associated with diabetes, such as heart disease and nerve damage.