In type I diabetes, insufficient levels of insulin result from the immune system itself attacking the pancreatic beta cells. On the other hand, while beta cell dysfunction varies widely between type II diabetes patients, insulin resistance is a major part of the disease. Restoring the beta cells of the pancreas to health is the treatment approach these two diseases share to some degree.
Diabetes is a disease in which your blood glucose, or blood sugar, levels are too high. Glucose comes from the foods you eat. Insulin is a hormone that helps the glucose get into your cells to give them energy. With type 1 diabetes, your body does not make insulin. With type 2 diabetes, the more common type, your body does not make or use insulin well. Without enough insulin, the glucose stays in your blood. You can also have prediabetes. This means that your blood sugar is higher than normal but not high enough to be called diabetes. Having prediabetes puts you at a higher risk of getting type 2 diabetes.