In type II diabetes, either the body does not produce enough insulin or the cells just ignore the insulin. If the cells lose the ability to respond to insulin, the body will fail to remove excess glucose in the bloodstream.
Insulin is necessary for the body to be able to use sugar. Sugar is the basic fuel (energy) for the cells in the body, and insulin takes the sugar from the blood into the cells. If glucose builds up in the blood instead of going into cells, it will cause symptoms such as tiredness, weight-loss and blurred vision. In extreme cases, it can lead to blindness, nerve damage, heart disease and premature death.
Have diabetes is scary, but don't panic. Eventhough type 2 diabetes is serious, people with diabetes still can live long, healthy and happy lives.