The common name for the disease caused by a lack of insulin is diabetes. Insulin is a hormone that regulates blood sugar levels, and without it, individuals can experience high glucose levels, leading to various health complications. There are two main types of diabetes: Type 1, where the body does not produce insulin at all, and Type 2, where the body becomes resistant to insulin or does not use it effectively. Managing diabetes involves a combination of medication, lifestyle changes, and careful monitoring of blood sugar levels to maintain overall health and prevent complications.