The really interesting thing is not that T1D diagnosis has erased the label for "Juvenile onset diabetes" because it can happen at any age, it's that those previously-thought-destroyed pancreatic cells that produce insulin, are actually continuing decades after disease diagnosis and can be "reactivated" via BCG or Valter Longo's FMD:

"Identifying most people with T1D continue to secrete varying amounts of insulin and C-peptides for decades after initial diagnosis:

https://www.healthline.com/diabetesmine/dr-faustmans-controv...

See below for my deeper response on these and other issues:

https://news.ycombinator.com/item?id=30382364

Peak age of diagnosis is mid-teens with quite a sharp bell curve. But, it can develop at any age.

It takes a genetic predisposition and a trigger - perhaps a virus? - for your immune system to start eating your pancreas' insulin-producing cells.

The old labels of "juvenile diabetes" etc. are as unhelpful as the notion it's caused by obesity.

My nephew was 22 when diagnosed: https://www.healthline.com/diabetesmine/charlie-kimball-diab...

T1D can be triggered at any time in a person’s life. It’s autoimmune. Thinking of it as a childhood disease is outdated and (fortunately) most doctors are becoming aware of that.

diagnosed at 25, it happens :-/