This is the comment I was going to write. I am not a parent and I have no experience with diabetes, but in my simple mind, if insulin's main role in the body is

This is the comment I was going to write. I am not a parent and I have no experience with diabetes, but in my simple mind, if insulin's main role in the body is to control blood glucose, and the main trigger of blood glucose is carbohydrates... why not restrict carbohydrates? As with parent comment, it would just eliminate the blood glucose level rollercoaster that diabetics are otherwise expected to endure. You probably would not be able to find a nutritionist that would recommend such a diet for a toddler though, given the current mainstream recommendations on meat, fat and low carbohydrate diets.