Conquering Fat Logic: how to overcome what we tell ourselves about diets, weight, and metabolismWhy do diets fail? Is it because of genetic disposition? A sluggish metabolism? An underactive thyroid? A behavioural psychologist reveals the truth about dieting, including how she lost over 100lb in one year. After years of failed diets Dr Nadja Hermann weighed over 23 stone at the age of 30. All her life, she had heard and read about hundreds of reasons why diets wouldn't work for her. But when her weight started to seriously affect her health, she