What Is a Calorie Deficit? Calories are a measure of the amount of energy in food. All of the cells in your body require energy in order to work properly, just like a car needs fuel. They get that ...

Corrections & clarifications: An earlier version of this story misspelled the name of the spokesperson for the Academy of Nutrition and Dietetics. She is Caroline Susie. Few things are as essential as ...

When you're looking for foods that are low in both carbs and calories, your best choices are low- and nonstarchy vegetables. They often have a high water and fiber content, so they are low in energy ...