Putting it ridiculously simply: The sugars that you can't burn off, are stored as fat on the liver. That's a really, really short version of a longer story, but it explains why so many T2's have non-alcoholic fatty liver disease, and potentially, obesity.
So when you say you're on zero calories.... You'd be faring better with more calories and fewer carbs. The calories aren't the problem for someone with metabolic syndrome, the carbs are. Reduce those, and you reduce the fats packed onto your liver, as reduce your blood glucose level. It's win-win all over the place, and you should be able to get your numbers our of the prediabetic range, back into the normal range, right-quick.
https://josekalsbeek.blogspot.com/2019/11/the-nutritional-thingy.html should help.
Good luck!
Jo