In the first article of this two-part series on sugar, we looked at the history and science of natural sweeteners. Sugar is an energy source, so it burns off easily in moderate doses — less than 10 teaspoons a day, says the American Heart Association — but most of us consume way more than that. This surplus sugar often sticks around in our bodies, enlisting in the fat reserves instead of the energy infantry. But what if we could stop sugar from sticking around?