With a ketogenic diet you can reduce the amount of insulin you need to take by like 80%. However, if you screw your diet and get out of ketosis (by eating high-carb food, even once) you may risk death from a condition called Ketoacidosis. However you can only get ketoacidosis if you're a hedonistic nigger monkey that really wants to eat some trash food, so you're probably smart enough to follow the damn diet.
I suggest you search stuff about keto diets and the benefits yourself. If you have a doctor they'll probably also recommend it, since it's a well-accepted diet for combating other disorders too.