imo, I don't think the age that gurus die at is relevant. After all, some gurus came to their dietary(and non-dietary-) solutions only decades after basically ruining their lives and health following more conventional methods. And everybody is different re experiences, genetics, sheer willpower etc. For example, Winston Churchill, one of the most debauched, dissolute politicians of all time, managed to live till 90 despite spending several fortunes on daily consumption of vast amounts of whiskey, champagne, claret etc., not counting all the smoking of cigars etc.