Perhaps it can be cured through a change in diet (but this will not work for everyone). However, if you do cure your diabetes through a change in diet, then it is quite likely that you can't go back to what you ate before. Some will say that this means you're not actually cured. To me it's an academic question. My blood glucose levels are normal with the way I now eat. If I went to doctor that I'd never seen before, they'd never diagnose me as diabetic. They'd likely not even ask what I ate, but just look at my blood test results and declare me non-diabetic.