Head Strong: The Bulletproof Plan to Activate Untapped Brain Energy to Work Smarter and Think Faster-in Just Two Weeks (Bulletproof 3)New York Times Bestselling AuthorFrom the creator of Bulletproof Coffee and author of the bestselling The Bulletproof Diet comes a revolutionary plan to upgrade your brainpowerin two weeks or less For the last decade, Silicon Valley entrepreneur Dave Asprey has worked with world renowned doctors and scientists to uncover the latest, most innovative methods for making humans perform bettera process known as biohacking. In his first book, The