Jobs apparently thought that his vegan diet caused him not to emit any sort of body odor.
The Apple cofounder believed that as a result he didn't need to wear deodorant or shower regularly, Isaacson's book said.
Sometimes Jobs would fast for several days at a time, which he said would create feelings of euphoria, per the biography.
In 2003, when Jobs was diagnosed with pancreatic cancer, he tried to heal himself through his diet, eating a lot of juiced fruit and carrots.
Five years later, he reintroduced fish and other proteins back into his diet after part of his pancreas was removed. But by the time of his death in 2011, the Apple cofounder was on a mostly liquid diet.