Type 1 diabetes is a chronic and autoimmune disease characterized by the insufficient production of insulin, a hormone that is essential in transforming blood sugar (or glucose) into energy, through the pancreas. This lack in insulin secretion leads to an accumulation of blood sugar, also known as hyperglycemia. Thus the body and its organs no longer receive the fuel needed for proper functioning, since the sugar is trapped in the blood. The symptoms of Type 1 Diabetes (T1D) must always be taken seriously: untreated hyperglycemia can be deadly in the space of a few days.
So far, Type 1 Diabetes is neither preventable nor curable. T1D is presumably linked to the autoimmune destruction of insulin producing cells in the pancreas, however the exact cause is unknown.