I was found to be pre diabetic, completely reversed it by low carbing. I wasn’t overweight at all, so no weight to lose. Ten years later I still have no signs of type 2 diabetes. This explains it better than I can… https://www.practicaldiabetes.com/wp-content/uploads/sites/29/2016/03/Low-carbohydrate-diet-to-achieve-weight-loss-and-improve-HbA1c-in-type-2-diabetes-and-pre-diabetes-experience-from-one-general-practice.pdf