Allopathy does not know why pancreas fails to function in the first place, and never would know with the standard of modern medicine faculties as to the cure of the condition called by them as diabetes; and with its low-level know-how, the allopathy cannot even utter a word on diabetes.
If the patients say after a year of the treatment their pancreas had begun to function again, then, the patient was not suffering from 'diabetes' at all and that was a false diagnosis; surely all the one year of treatment has been rejected by the system, naturally.