Phil Libin: Evernote co-founder's fasting euphoria

Phil Libin, co-founder and former CEO of Evernote, the note-taking app, recently moved into a new phase of his life. He turned 45, launched a new AI startup studio, All Turtles, and perhaps most significantly, lost a ton of weight. Phil has been a big guy since his late teens. He knew he was obese but did nothing about it until eight months ago. That’s when he decided to join the growing clan of fasting enthusiasts in Silicon Valley. It worked. He has lost 86 pounds (39 kilograms). Blood test...