Whenever someone dies from a disease of civilization at a young age, 
I become curious as to the diet they followed. This is what I've been 
able to get from the web: Back in Apple's formative days Steve was a 
fruitarian/raw vegan. After that he was best known for being a 
vegetarian. Steve was having digestive problems along the way, and 
because of those investigations his cancer was diagnosed at an early 
stage. Immediate surgery was recommended. Instead Steve spend nine 
months trying to cure his cancer with diet. It got worse and then he 
got the operation. This delay was not helpful and probably shortened 
his life some.

Then I find something about a lack of protein. In his later years he 
was a pescatarian. He was very good friends with Dean Ornish. One can 
presume that he followed Ornish's recommendations and avoided all fats.