best sugar clinics near me What is type 1 diabetes Diabetes occurs when your blood glucose also called blood sugar is too high Blood glucose is your main source of energy and comes mainly from the food you eat. Insulin, a hormone made by the pancreas helps the glucose in your blood get into your cells to be used for energy. another hormone, glucagan works with insulin to control blood glucose levels in most people with type 1 diabetes, the body s immune system, which normally fight infection attacks and destroys the cells in the pancreas that make insulin