An curved arrow pointing right. Tim Ferriss, author of "The 4-Hour Workweek" and "Tribe of Mentors," is a firm believer in ketogenic diets and fasting. Here's why he believes so firmly in it.

"While listening to Tim Ferriss' podcast as I was organizing my ... I immediately went downstairs and told my daughter Zaza, who's 4, and my son Townes, who's 2." "We made a plan to do something ...

Not only has his weekly podcast, The Tim Ferriss Show, now reached 80 million downloads, but the self-help guru drives sales of books, teas, sardines, toothpaste and any other product or tool he ...

Tim Ferriss, the author of "The 4-Hour Workweek" and "Tribe of Mentors," says the best mentors won't give you all the answers, but will give you the ability to find them yourself. Following is a ...