Ellsworth Wareham...

...is a 97-year old former heart surgeon who only stopped working two years ago. The Times has an interesting piece today on the longevity of the residents of Loma Linda, California. Wareham (my emphasis):

...is often used as an example of someone with more energy than someone half his age. Dr. Wareham attributes his health at least partly to the fact that he has been a vegan for the last 30 or 40 years (he does not remember precisely).

Eating at home, he said, is the best way to ensure that one is eating healthy food.