I betcha that person wouldn't put himself or any member of his family through what seems to me like a very dangerous experiment trial, there is no way i would let anyone experiment on my long term health, Diabetic complications can be deadly.
The real answer to be extremely careful not to rise your blood sugars above
normal range, be kind to your body and it will eventually thank you, things don't happen overnight but you have a golden opportunity now to loose that prediabetic state, choosing a well balanced diet for your particular needs is very important, a dietitian's help would be useful, ditch any high sugary carbs, its only rubbish that you don't need, eating high fibre low GI foods will release more slowly into your blood stream which will give you the benefit of keeping you fuller for longer and it also takes the strain off your pancreas producing enough insulin.

Brian