“I've found cinnamon to be very effective for lowering the glycemic response to meals. People have heard that before, but I didn't realize how profound it could be until I did the actual testing with continuous glucose monitors. And I tested all different varieties and species of cinnamon from Ceylon to Saigon.”

American entrepreneur, investor, author, podcaster

Timothy Ferriss is an American entrepreneur, investor, author, podcaster, and lifestyle guru. He is known for his 4-Hour self-help book series, including The 4-Hour Work Week, The 4-Hour Body, and The 4-Hour Chef. Those books made him widely known for advice on optimizing everyday life, though he has since reconsidered that approach. He has also supported scientific research into psychedelic treatments, extending his public work beyond the self-help genre.