I haven't seen any human data on this, so please share if you have, but in animal models of T1D, impaired calcitriol conversion occurs within days of the onset

I haven't seen any human data on this, so please share if you have, but in animal models of T1D, impaired calcitriol conversion occurs within days of the onset of diabetes. If they had to develop renal failure in order to have impaired Vitamin D metabolism, then I would agree that the timecourse makes no sense.