sorry, a poor choice of phrase, wheat belly is a lose weight, diet site.
the odds are you will never be a diabetic, even if you do nothing there is a 66% chance you
won't get diabetes
Impaired glucose tolerance (pre-diabetes)
Impaired fasting glucose and impaired glucose tolerance are sometimes referred to as ‘pre-diabetes’. They occurs when your blood glucose level is higher than normal, but not high enough to be called diabetes. One third of people who have impaired glucose tolerance or impaired fasting glucose will develop diabetes unless lifestyle changes are made.
a IGT is a long way off even being a mild diabetic, let alone one who has gone years with uncontrolled bad diabetes and getting complications
If you do decide to go LC for 6 months, you won't have any trouble going vegetarian low carb, there is lots about it on the net
Stocking the low carb veterinarian kitchen
http://www.sheknows.com/food-and-recipes/articles/4408/stocking-the-low-carb-vegetarian-kitchen