My father has been part of the Diabetes Control and Complications Trial (DCCT) [1] and its follow-up study Epidemiology of Diabetes Interventions and Complicati

My father has been part of the Diabetes Control and Complications Trial (DCCT) [1] and its follow-up study Epidemiology of Diabetes Interventions and Complications (EDIC) My understanding is that the study has been fairly conclusive in proving that maintaining blood sugar levels as close to the normal range as possible has a positive impact on many of the previously thought "inevitable" side effects of diabetes (like losing your vision, losing feeling in your extremities, kidney failure, etc.). He's justifiably proud of having helped in some small way improve the outcomes for lots of other folks. 1 - https://pubmed.ncbi.nlm.nih.gov/2882967/ https://pubmed.ncbi.nlm.nih.gov/2882967/ 2 - https://repository.niddk.nih.gov/studies/edic/ https://repository.niddk.nih.gov/studies/edic/