More than half a billion adults and 40 million children on the planet are obese. Diabetes is a worldwide epidemic. Evidence increasingly shows that these illnesses are linked to the other major Western diseases: hypertension, heart disease, even Alzheimer's and cancer, and that shockingly, sugar is likely the single root cause. Yet the nutritional advice we receive from public health bodies is muddled, out of date, and frequently contradictory, and in many quarters still promotes the unproven hypothesis that fats are the greatest evil. With expert science and compelling storytelling, Gary Taubes investigates the history of nutritional science which, shaped by a handful of charismatic and misguided individuals, has for a hundred years denied the impact of sugar on our health.