Your gut is astonishingly clever. It contains millions of neurons—as many as you would find in the brain of a cat—and is home to the microbiome, an army of tiny organisms that influence your mood, your immune system, and even your appetite. In this groundbreaking book, Dr. Mosley takes us on a revelatory journey through the gut, showing how junk food and overuse of antibiotics have wiped out many “good” gut bacteria leading to a modern plague of allergies, food intolerances, and obesity. Drawing from the latest cutting-edge research, Dr. Mosley provides scientifically proven ways to control your cravings, boost your mood, and lose weight by feeding the “good” bacteria that keep you healthy and lean, while staving off “bad” bacteria that contribute to weight gain and disease.