Type 2 diabetes is based mostly on insulin resistance that is thought to be mostly genetic. However, visceral fat (which can be genetic) secretes harmful substances that can cause the onset of type 2 diabetes. That is why when diabetics lose weight they commonly have fewer to no problems with diabetes. When you choose the right diabetes center you are evaluated and supervised by a qualified endocrinologist. Your glucose levels are closely tracked and exercise and diet plans are provided and taught.