Insulin therapy is a crucial treatment for individuals with Diabetes Mellitus, particularly those with Type 1 Diabetes and some with Type 2 Diabetes. It involves the administration of insulin to help regulate blood sugar levels, which is essential for maintaining overall health and preventing complications. There are various methods of insulin delivery, including injections and insulin pumps. The therapy is tailored to each individual's needs, taking into account factors such as lifestyle, diet, and blood glucose monitoring. Proper management through insulin therapy can significantly improve the quality of life for those living with diabetes.