Why do diets fail? Is it due to genetic disposition? A sluggish metabolism? An underactive thyroid?After years of going on failed diets, Dr Nadja Hermann, a nutritionist and behavioural psychologist, weighed 150 kg at 30 years of age. Over the years, she had read and heard hundreds of reasons why diets simply wouldn’t work for her. But when her weight started to affect her health profoundly, she took a hard look at the science, and realised that most of what she believed about diets was a myth. Moreover, she realised that logical fallacies were preventing her from losing weight.Throwing all these pieces of ‘Fat Logic’ overboard was what finally helped the author achieve a healthy weight. One and a half years later, she weighed 65 kg. Now, using humour, the know-how she’s acquired, and a pinch of science, Hermann clears up widespread lies about diet and weight loss, and shows how it is possible to attain a healthy weight.