tl;dr: Type 1 diabetes is an autoimmune disorder in which your body kills the insulin-producing cells in the pancreas, leaving you with no ability to produce insulin. Type 2 sufferers, on the other hand, can usually produce a normal amount of insulin, but their cells don't respond to it sufficiently.
tl;dr: Type 1 diabetes is an autoimmune disorder in which your body kills the insulin-producing cells in the pancreas, leaving you with no ability to produce insulin. Type 2 sufferers, on the other hand, can usually produce a normal amount of insulin, but their cells don't respond to it sufficiently.