"Leading gastroenterologist Dr. Will Bulsiewicz, or "Dr. B," introduced readers to the wonders of fiber with the New York Times bestseller Fiber Fueled-a guide to optimizing the gut microbiome, sharpening immunity, lowering cholesterol, and promoting weight loss through a diet rich in diverse fruits, vegetables, nuts, seeds, and legumes. Rather than restriction, Dr. B's solution is abundance and variety. Now he applies all the principles of the Fiber...