The descriptions of Type 1 and Type 2 Diabetes above are mostly true, but there is a little over-simplification. My Dad's weight was under control when he had to start taking meds for his blood sugar, and, after a few years, insulin injections. BUT this was in his mid-late 80s, the last 5 or 7 years of his life. I think his pancreas was "tired".
I don't know nads' age, but I'm pretty sure that what pushed her into pills and then insulin injections was lack of knife, fork, and spoon control. I was about to say, "complicated by physical limitations," but one need not be trying to win races or weight-lifting competitions to walk/run 5K a day and/or strengthen one's core and limbs. Being there, doing that.
All in all, sounds like nads' health is that of an octogenarian while being only in her 50s or 60s.