The Skinny Gut DietBy: Brenda Watson C. N. C., Leonard Smith M. D., Jamey Jones B. Sc. The secret to permanent weight loss revealed. The real reason diets fail has nothing to do with calories and everything to do with the balance of bacteria in your gut. A simple guide to show you how to finally achieve your ideal weight. The 100 trillion bacteria that live in your digestive tractwhich make up 90 percent of the cells in your bodyare the real reason you gain or lose