Many wonder why some people can eat whatever they want while others gain weight just by looking at food. The answer likely lies in the gut. Numerous studies now suggest that the composition of microorganisms living in the gut determines whether someone is overweight or not. The gut flora of overweight individuals differs from that of those with a normal weight and influences, in various ways, how much energy is extracted from the consumed food. Overweight individuals have a higher proportion of bacterial species that efficiently convert complex carbohydrates into sugars and fats. The Gut Slimming Program by nutritionist Pia-Franziska Reichwein and probiotic expert Dr. Mathias Oldhaver demonstrates, based on current research findings, how specific gut bacteria can help.