In the course of research, Tim Spector has been shocked to discover how little scientific evidence there is for many of our most deep-rooted ideas about food. Is salt really bad for you? Is fish good for you? What about coffee, red meat or saturated fats? Can pregnant women rely on their doctor's advice about what to eat? Does gluten-free food carry any health benefits at all? Do doctors know anything about nutrition? In twenty short, myth-busting chapters, Spector reveals why almost everything we've been told about food is wrong.