To restate bayesian_horse's point: the lack of insulin means the glucose isn't going anywhere to be used. Insulin allows liver and muscle cells to take up gluco

To restate bayesian_horse's point: the lack of insulin means the glucose isn't going anywhere to be used. Insulin allows liver and muscle cells to take up glucose (the body's main energy source) from the bloodstream. No insulin -> cells can't absorb glucose from bloodstream -> high blood glucose + coma + wasting away.