Insulin is a hormone that helps regulate blood sugar (glucose) levels in the body. People with diabetes may require insulin treatment when their bodies cannot produce enough insulin or cannot effectively use the insulin they do produce. There are two main types of diabetes that may require insulin treatment: Type 1 diabetes and advanced cases of Type 2 diabetes. Type 1 Diabetes: Type 1 diabetes is an autoimmune condition where the immune system attacks and destroys the insulin-producing beta cells in the pancreas. Individuals with Type 1 diabetes need insulin therapy to survive. Treatment usually involves multiple daily injections or the use of an insulin pump. Basal Insulin: Basal insulin provides a slow, steady release of insulin to manage blood sugar levels between meals and overnight. Bolus Insulin: Bolus insulin is taken before meals to help control the rise in blood sugar that occurs after eating. Insulin Pump: Some people with Type 1 diabetes use insulin pumps, which continuously deliver basal insulin and allow for bolus doses before meals. Type 2 Diabetes: People with Type 2 diabetes may also need insulin if other medications, such as oral antidiabetic drugs, do not sufficiently control blood sugar levels. Basal Insulin: Similar to Type 1 diabetes, basal insulin helps maintain steady blood sugar levels between meals and overnight. Bolus Insulin: Bolus insulin may be prescribed to be taken before meals to control post-meal blood sugar spikes. Combination Insulin Therapy: Some individuals with Type 2 diabetes may be prescribed a combination of basal and bolus insulin to address their specific needs.