You may have a pretty good idea of how much you should be eating per day. Or you might not have a clue and simply tuck into whatever you fancy. But understanding how calories – a unit of energy – ...

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 ...

The number of calories a person burns each day varies depending on a person’s weight, height, sex, and activity levels. One way of calculating a person’s daily calorie usage is the Harris-Benedict ...