Diabetes is a health condition is caused by resistance to, or deficient production of, the hormone insulin, which helps glucose move from the blood into the cells. It’s important to realize what are good and not so good diabetes glucose levels. As a result, when the body does not produce or use enough insulin, the cells cannot use glucose and the blood glucose level rises. This means that the body will instead start to break down its own fat and muscle for energy. In conclusion, this may lead to severe problems, including damage to the heart, blood vessels, eyes, nerves, and kidneys.