The New York Times bestselling author, Bulletproof Coffee creator, and father of biohacking teaches you how to upgrade your brain to speed it up or slow it down at will and alter your physical and mental states. In his twenties, Dave Asprey battled debilitating brain fog and chronic fatigue syndrome. Frustrated by his broken brain, he embarked on a lifelong quest to upgrade his "MeatOS"--to fix his brain, biohack his biology to live past the age of...