Why do diets fail? Is it due to genetic predisposition? A faulty metabolism? Or thyroid dysfunction? After years of unsuccessful dieting and weighing 150 kilos, Dr. Nadja Hermann realized that much of what she believed about diets was myth. Instead, she understood that there were underlying logics that prevented her from losing weight. It was only by discarding all these "fat logics" that the author was able to achieve a healthy weight. 1.5 years later, she weighs 65 kg. With humor, expertise, and a touch of science, she debunks the widespread diet lies.