Do you suffer from elevated blood sugar, type 2 diabetes, or overweight? Perhaps you are constantly thirsty or need to use the bathroom frequently. Maybe your wounds heal slowly, or you feel unusually tired. Or, more likely, you have no symptoms at all. Millions of people have elevated blood sugar levels—and yet many are unaware of it. When bestselling author and nutrition expert Dr. Michael Mosley received his diagnosis of type 2 diabetes, he immediately began to explore the scientific connections between calories, carbohydrates, obesity, insulin, and diabetes. His new book focuses on one of the most important indicators of our health: blood sugar, and its insidious rise that precedes type 2 diabetes—known as prediabetes.