In his 30s, Alvise “Luigi” Cornaro had become very sick. Suffering pain, fatigue, constant thirst and intestinal distress, his doctors gave him only a few months to live. He radically changed his diet, and within a year was not only still alive, but symptom free and full of energy! He maintained this new diet for decades (except for a short time in his 70s), and in 1558 (at the age of 91 . . . or 94, or 83, or maybe 74 . . . sources disagree on dates) he published a diet and lifestyle book, titled How to Live 100 Years, or Discourses on a Sober and Temperate Life.