No, chocaholics aren't destined to develop diabetes. The disease is thought to be caused by a combination of genetic and lifestyle factors. And the high level of sugar in someone's bloodstream is not the same thing as the refined stuff you buy in bags from the supermarket. That said, being overweight can increase the risk for developing type 2 diabetes, and eating a lot of sugar can pack on the pounds. If your family has a history of diabetes, eating healthfully and exercising regularly is recommended to keep everyone's weight in check. For those who already have diabetes, those same things will help them manage the disease.