Had pancreatitis because of his diet. A diet in which he thought would magically avoid creating body odor.
It turned into cancer. He lucked out that it was a rare form of treatable pancreatic cancer with a 90% survival rate 5 years out. Which is abnormal as most forms of pancreatic are essentially a death sentence. Survival rate past 3 years is under 10% for the more common variants.
Stuck to his diet anyway. Ignored his doctors. Died to an illness he had a 90% chance of beating because he knew better.
He also jumped the line to get a liver transplant once he, presumably, decided maybe there’s a chance the diet thing wouldn’t work out.
Died shortly thereafter, wasting a perfectly good liver.
A diet in which he thought would magically avoid creating body odor.
Those of us who have this problem know that your diet really does affect that. Actually others can sometimes say what we’ve eaten a few hours before.
However, Jobs’ case is kinda extreme, usually eating less sugar and fat and more carbs is kinda sufficient.
Jobs actually believed he didn’t need to take baths though, it was more extreme than just reducing his smell, he legitimately believed he didn’t smell at all.