Hi Natalie @natalie_b_148, a Warm Welcome to TypeOneNation Forum! I hope you enjoy and profit from what you will see here - and please contribute your thoughts and questions freely.
“Diabetes Complications” is a term not easily defined, and many of those conditions are experienced by people who do not have diabetes. That said, I will agree that people with autoimmune onset diabetes, currently referred to as TypeOne, may have an increased probability for developing certain “complications”. There is an ongoing Joslin Medalists study [published findings at joslin.org] of people who have lived with diabetes for more than 50 years that has found many participants who have Not developed complications.
I’m in my seventh decade living with diabetes and I’m experiencing some of the complications, two of those which are very probably caused by complete failure to manage my diabetes in the early years - I learned my lesson the hard way but too late to avoid retinopathy which was diagnosed in 1966. In those days the prognosis was total blindness within two years, but thankfully I volunteered as a guinea pig with a LASER and my vision was saved.
My kidneys are still working wonderfully, according to lab-tests and my doctors. Atherosclerosis, narrowing of blood vessels, is another story. I needed two artery stents inserted LAD four years ago, and according to the surgeon who inserted the “child size” stents the narrowing wasn’t caused by cholesterol [I’ve been eating 'healthy now for many years and keep my total cholesterol below 120], but rather by anatomic nephropathy, a narrowing of passages, which has been seen [only] in people with long-term diabetes.