Your body will never waste a calorie. Each calorie is either burned for energy or stored for later use. Calories come in three forms, which are the macromolecules of human nutrition: fat, protein and carbohydrates. Carbohydrates are interesting. The basic building block of all carbohydrates, whether simple or complex, is a single sugar molecule called glucose. This means that all carbohydrates, from whole grains to table sugar, will eventually break down into a single glucose molecule. Glucose is the main energy source for all cells, including your heart, brain and muscles. But here’s where it gets interesting: Sugar, if it’s not burned […]